Scientific Program

Conference Series Ltd invites all the participants across the globe to attend 13th International Conference on Optics, Photonics & Laser Berlin, Germany.

Day 1 :

Conference Series Euro Optics 2020 International Conference Keynote Speaker Ahmet ALTUNCU photo
Biography:

Prof. Ahmet ALTUNCU has completed his Ph.D. degree from University of Essex  in 1998. He is  a full professor at the Department of Electrical and Electronics Engineering in Kütahya Dumlupınar University in Turkey since 1998. He is also the Director of Photonics Technologies Application and Research Center. His research interests are novel erbium doped fiber amplifier designs for broadband optical communication systems, wideband wavelength tunable fiber ring lasers and fiber optical sensor systems. He has published more than 50 international journal and conference papers on fiber optical based communication and sensor system applications.

 

Abstract:

In recent years, tunable laser sources having a wide tuning range, narrow linewidth and stable output power have attracted great attention to be used in many applications such as in dense wavelength division multiplexing (DWDM) network systems, fiber optical sensor systems and testing and characterization of fiber optical components and subsystems. In particular,  erbium doped fiber ring lasers (EDFRLs) with a tunable broadband flat spectrum over C and L-bands are preferred due to their advantages of low-intensity noise, high output power and low coupling losses. However, due to their relatively long cavity lengths, they require a careful design to achieve highly stable laser operation with a single longitudinal mode. Several configurations have been proposed in the literature for broadband EDFRLs based on conventional fiber ring laser structure using different types of all-fiber filters. We have also recently presented performance characteristics of stable and widely tunable EDFRLs designed with micro-electro-mechanical system based optical tunable bandpass filter for the conventional EDFA, loop EDFA and double-pass EDFA based configurations. The critical design parameters of the EDFRL such as EDF length, output coupling ratio and pumping level were experimentally investigated to optimize for a tunable in broadband, stable, narrow linewidth laser operation. Tuning ranges of wider than 80 nm covering both C and L bands have been achieved using the proposed EDFRL configurations with a high (~60 dB) OSNR. In this study, we critically analyze the different types of proposed EDFRL structures and compare their performances with the previous presented studies regarding broadband applications.

 

  • Optical imaging and sensing | Photonics and its Devices | Lasers in Medicine| 3D Laser Triangulation
Location: Berlin, Germany
Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Rui Jiao

PhD,Tong University, Shanghai China

Title: SSIM-Optimization-based Phase Retrieval Method for Optical Imaging

Time : 15:30-16:00

Biography:

Rui Jiao was born in Yunnan, China. She received the B.S degree in electronic science and technology from Xidian University,Xi’an, China, in 2018. She is currently working toward the Master degree in State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, China.

 

Abstract:

Phase retrieval is an important issue in the field of engineering physics, studying how to estimate a signal from its Fourier transform magnitude. Iterative projection algorithms are generally used in phase retrieval, which being a substitute of lenses, numerically rather than optically, to recombine light scattered by illuminated objects. In order to optimize iterative phase retrieval method, phase retrieval for optical imaging based on structural similarity(SSIM) algorithm optimization is proposed. SSIM is used to evaluate each iterative results of phase retrieval and obtain the termination conditions of the iterative process. Experiments show that the proposed method lead to less iteration number and higher reconstruction fidelity, it also provides a general solution for imaging with phase retrieval.

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Edgard da Silva Neto has completed his Medical School at the age of 23 years from Universidade de Nove Julho and General and Plastic Surgery training at Santa Casa de São Paulo. Is completing his doctoral program in Biophotonics applied to health systems at Universidade Nove de Julho. He is assistant at Plastic and Reconsgtructive surgery in Santa Paula Oncology Institute and Medicine Professor at Universidade Nove de Julho.

 

 

Abstract:

Background: Laser assisted Indocyanine Green Angiography (LAICGA) has actually become a reality, helping surgeons to determine flap perfusion intraoperative and allowing best outcomes in breast reconstruction, by determining flap viability and secure volume of intraoperative expansion. This study stratified outcomes based on a meta-analysis of complications.

Objective: A systematic review and meta-analysis to verify if LAICGA prevents complications and improve outcomes in breast reconstruction

Methods: Only longitudinal trials comparing clinical assessment of skin flaps to pacients submitted to LAICGA during breast reconstruction trials were included. MEDLINE (PubMed), Google Scholar and LILACS databases were searched for articles published up to December 2018. Random-effects meta-analyses were conducted for complications (necrosis, infection, seroma and surgical reintervention.

Results: Ten studies reporting LAICGA in breast reconstructions met inclusion criteria containing control group with clinical evaluation and reported outcomes of interest (n: 2256). The risk of ocurrence of flap necrosis was 2.06 times higher in control group (clinical assessment), with statistical relevance (p: 0.0006), 95% CI (1.36 – 3.11). Necessity of reoperation for any complication was statistically relevant, addind a relative risk of 2.06 comparing to clinical assessment (p:0.0002), 95% CI (1.41-3.0). Incidence of infection was higher on the control group (OR: 1.78, 95% CI,1.00 – 3.17) but not statistically relevant (p: 0.05). Seroma did not differ from both groups neither clinically or statistically (OR: 1.06, 95% CI, 0.60-1.86, p: 0,85).

Conclusions: The use of LAICGA during breast reconstruction procedures prevents form necrotic events and need for surgical reintervention. The study suggests that LAICGA has benefits from preventing infection.

 

Biography:

Variouis applications in quantum information require entangled photon sources that meet stringent criteria including brightness, near-unity fidelity, and low multi-photon emission. A quantum light source that meets all of these requirements at once is yet to be developed. In this work we present a source of entangled photon pairs, based on quantum dots in photonic nanowires, with a clear route to meet all of these criteria. Our results indicate that the source generates entangled photon pairs with no dephasing, during the emission lifetime. Therefore, measuring near-unity entanglement fidelity is limitted only by multi-photon emission of the source and the quality of the detection system, i.e. timing jitter and the dark counts. The latter has been largely disregarded in the literature and other features of the quantum dots, such as fine-structure splitting and spins interactions, have been reported to be the main obstacles in measuring perfect entanglement. Moreover, results attributed to resonant two-photon excitation and enhancement of the source in terms of pair-extraction efficiency and multi-photon emission will be presented. Based on our analysis, nanowire QDs have the potential to surpass the performance of spontaneous parametric down conversion sources. Furtheremore, we will also present a novel universal method to erase the fine-structure splitting of QDs using an all-optical approach.   

Our results provide more insight into the nature of the two-photon biexciton-exciton cascade and demonstrate a clear path towards reaching perfect entanglement in semiconductor quantum dots in the future for the first time.

 

 

Abstract:

Arash Ahmadi has completed his PhD at Institute for Quantum Computing in 2019, in Quantum Information. His research on nanowire QDs has lead to enhancing the performance of these sources in terms of entanglement fidelity and pair-extraction efficiency. Moreover, he has contributed to two separate proposals for erasing the fine-structure splitting of QDs.

 

Biography:

Dr Luana Campos has completed his PhD at the age of 29 years from University of São Paulo (USP) and postdoctoral studies also from USP. She is the professor in post-graduation program in Implantology of University of Santo Amaro. He has published more than 20 papers in reputed journals and has been serving as an editorial board member of repute.

Abstract:

The number of anticoagulated patients has been increasing over the years and it is common that they seek dental care; however, submitting them to invasive dental procedures is a matter of continuous debate in the literature. Although the use of high-power lasers (HPL), manly by hemostatic capacity, has been considered as an alternative for conservative surgery and periodontal tissue management, there is not enough scientific evidence on its actual indication for this group of patients. Thus, the aim of this paper is to present a clinical report on the use of HPL for secondstage implant surgery in a patient on rivaroxaban therapy for Factor V Leiden and antiphospholipid antibody syndrome with a history of excessive bleeding related to implant installation, even interrupting anticoagulation medication 4 days before that. For that, no cessation of rivaroxaban intake was adopted and no complication was happened during or after the procedure. Therefore, the HPL could be an efficient tool for conservative surgery procedures in patients on anticoagulation medication therapy.

Biography:

Was born in Morocco, on January, 10, 1991. He took his Master's degree in systems and telecommunications at the Ibn Zohr University, Agadir, Morocco, in June 2014. He received the Ph.D. degree from Ibn Zohr University, Agadir, Morocco in July 2018. He is interesting to combining beam laser and shaped beam laser and rare earth ion doped fiber amplifier for telecommunication. He is currently a temporary teacher in faculty of sciences Ain Chock Casablanca Morocco.

 

Abstract:

Over the past decade, rare earth fiber laser sources have become one of the most popular and fast developing laser technologies. A coherently combined laser system includes a combining element placed in front of the laser (toward the output coupler) to superpose the beams. In this work, we will present an analytical model of an actively Q-switched Ytterbium-doped fiber laser by using two coupled cavities with amplifying fibers in Mach–Zehnder interferometer configuration. This oscillator system provides high peak power and high energy nanosecond pulse. The pulse energy is almost twice the energy of an individual fiber laser with a combining efficiency goes up 99%. This concept brings some novel perspectives for scaling the high energy and high peak power of nanosecond pulse fiber laser.

 

 

Biography:

Djumaeva N has completed her PhD at the age 40 years from Institute of Infectious Diseases(Uzbekistan). She is the Consultant ( Neurology) at the Institute for Virology, Uzbekistan. She has published 36 papers, including 2 patents.

 

Abstract:

The presence of some non- electromagnetic components in a laser sources for the first time was predicted by A. Akimov (Russia,1995) in the early nineties and experimentally revealed by A.Bobrov (Russia,1996).  This preliminary study describes an application of unusual properties   of low level laser radiation with laser light guide emitter (Patent Uzbekistan, 2005) in the field of which were placed different antiviral medications, with the aim of treatment the group of patients with different viral diseases.  In total, eleven   patients with verified virus pathology have been observed. For   therapy purpose were used the following medications:  Lamivudine (200mg), Daclatasvir(60mg),Sofosbuvir (400mg), Acyclovir(200mg),Ibavirin (Copegus0(200mg) in tablets, which were placed into the  laser light guide emitter. The obtained findings suggest that under the influence of non- electromagnetic field formed by laser light guide emitter, remote transmission of pharmacological properties of a medication to patient’s body occurs. Application of this technology enables to reduce duration of the therapy for CHBV and CHCV   infection patients. In some cases (CHCV infection virus, Epstein - Barr virus, cytomegalovirus   infection) this results in complete elimination of the virus infection.

Biography:

Hassab Elnaby, Salah  has completed his PhD at the age of 30 years from Orsay University (Paris) and postdoctoral studies from Ecole Polytechnique. He is the ex-director of laser technology center at Cairo University. He has published more than 25 papers in reputed journals. He was chairman of Engineering Applications of Lasers.   
 

 

Abstract:

Holographic projection is regarded as one of the most encouraging and powerful tools for providing three-dimensional (3D) information of the object without special eyewear. Recently, the progress in holographic recording and reconstruction techniques and the availability of the tools for the interpretation of holographic interferograms exhibit a strong promise for emerging the holographic projection as a powerful tool for medical applications. Consequently, medical holographic projection systems can be used as a valuable technique for displaying an accurate 3D representation of different body organs that further provide for better understanding, interpretation and diagnosis of different diseases. In this study, a real-time 3D holographic projection system for the abnormal structures (tumors) of magnetic resonance (MR) and computed tomography (CT) plane images is proposed. For a sequence of plane images, the tumor is detected from each layer to provide a 3D scene of the tumor. The level set evolution is utilized to precisely extract the tumor from the slice images. Phase-only computer-generated holograms (CGHs) for the detected tumors are calculated by applying a modified Gerchberg-Saxton (GS) iterative algorithm where the projection is based on plane wave decomposition. Then, a single two-dimensional (2D) phase hologram is calculated by the coherent superposition of all calculated complex-amplitudes holograms. The optical experiments are realized using a reflective phase-only spatial light modulator (SLM) to reconstruct a dynamic 3D image of the detected tumors. The achieved results revealed that the proposed 3D holographic visualization system can aid in better interpretation of tumors and in the achievement of well diagnostic results.

 

Biography:

Dr. Farshad Nejadsattari completed his PhD in solid state physics at the University of Ottawa in 2016. He continued his studies as a postdoc in professor Stadnik’s group where his research focused on theoretical and experimental studies of electronic structure and magnetic properties of novel compounds. He currently is a postdoctoral fellow in professor Ebrahim Karimi’s structured quantum optics group. During his research he developed experimental and theoretical methods of simulating dynamics of simple solid state systmes using the properties of single photons. Dr. Nejadsattari has over 15 publications in peer reviewed scientific journals and also a number of conference proceeding.     

Abstract:

A proper understanding of many phenomena in condensed matter physics is through examining their topological effects. In recent years, exploiting quantum simulators in studying topological properties of simple periodic systems (such as one- and two- dimensional) via invoking single photons has received numerous interests. These photonics quantum simulators are potentially useful in describing the physical properties emerging from the dynamics of electrons in periodic structures and can also be used in designing novel quantum computational systems. In this aspect, generalizing these simulators to consider closed geometries such as ring-shaped structures can lead to a broader range of simulating quantum mechanical phenomena in physics and chemistry. For instance, in aromatic molecules such as benzene or ozone, the transport properties and preferred bond formation is well-understood based on the specific spatial and spin distributions of their valence electrons. Classical simulators are not efficient in describing the mechanisms governing the

underlying dynamics and physics of such systems. In this work, we propose a theoretical and experimental model based on the discrete time quantum walk of single photons on a cyclic structure

composed of a finite number of identical sites. In particular, we simulate electron wave-packet dynamics under different initial conditions and different quantum walk gates for a six-sited geometry, namely simulating a benzene-like structure. We examine charge transport and charge localization, as well as the energy dispersion and group velocity relations in cyclic systems with our photonic quantum simulator.

 

 

Biography:

Dr Luana Campos has completed his PhD at the age of 29 years from University of São Paulo (USP) and postdoctoral studies also from USP. She is the professor in post-graduation program in Implantology of University of Santo Amaro. He has published more than 20 papers in reputed journals and has been serving as an editorial board member of repute.

Abstract:

The number of anticoagulated patients has been increasing over the years and it is common that they seek dental care; however, submitting them to invasive dental procedures is a matter of continuous debate in the literature. Although the use of high-power lasers (HPL), manly by hemostatic capacity, has been considered as an alternative for conservative surgery and periodontal tissue management, there is not enough scientific evidence on its actual indication for this group of patients. Thus, the aim of this paper is to present a clinical report on the use of HPL for secondstage implant surgery in a patient on rivaroxaban therapy for Factor V Leiden and antiphospholipid antibody syndrome with a history of excessive bleeding related to implant installation, even interrupting anticoagulation medication 4 days before that. For that, no cessation of rivaroxaban intake was adopted and no complication was happened during or after the procedure. Therefore, the HPL could be an efficient tool for conservative surgery procedures in patients on anticoagulation medication therapy.

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.

 

Biography:

Georgiana BULAI has completed her PhD at the age of 27 years from “Alexandru Ioan Cuza” University of Iasi and postdoctoral studies from same institution. She participated as a member in 7 national projects. He has published 30 papers in Web of Science indexed journals.

 

Abstract:

Cobalt ferrite thin films with preferential crystallographic structure, controlled composition and perpendicular magnetic anisotropy can be obtained by pulsed laser deposition. Their properties are influenced by the experimental conditions and thus by the plume characteristics. The analysis of the laser induced plasma can help explain the structural and chemical properties of the deposited nano-structured materials and also optimize the deposition process itself.

The aim of this study was to obtain information on the dynamics and properties of the expanding plasma generated by laser irradiation (Nd-YAG: 532 nm, 10 ns, 10 Hz) of a cobalt ferrite target. This was done through space- and time-resolved optical emission spectroscopy using an ICCD camera (PI-MAX3) and a monochromator (Acton SP2750). Both the global dynamics of the plasma and the evolution of individual species were analysed. To have an insight on the contribution of each element, plasma plume analysis of pure cobalt and iron targets were performed in the same conditions as the spinel magnetic material. The laser fluence (5 J/cm2) and gas pressure (10-3Torr) during the experiments were similar to the ones used for the deposition of thin films. From the space- and time-evolution of several spectral lines, we determined the velocities of the main plasma plume constituents. The excitation temperature distributions were obtained from the Boltzmann plot, in the assumption of local thermodynamic equilibrium. For a more accurate correlation, the same spectral lines analysed for the pure Fe(/Co) plasma were then considered when studying the cobalt ferrite plume.