Δημοσιεύσεις

Project Acronym: LaMIPlaS
Title: Laser Matter Interactions and Plasma Simulations
Affiliation: technological educational institute of crete
Pi: Vasilis Dimitriou
Research Field: laser matter interactions and plasma simulations

Surface Acoustic Waves generated on thin films after irradiation by femtosecond laser pulses
by Kaselouris, Evaggelos, Orphanos, Yannis, Kosma, K, Vasillis, Dimitriou, Bakarezos, Makis, Tatarakis, M and Papadogiannis, Nektarios
Abstract:
Thin film technology becomes increasingly advanced, with applications covering practically all sectors of industrial activity. This progress in thin-film technology and nanotechnology has come to demand the development of novel, non-invasive material characterization techniques in the micro-and nano-scale. The pulsed laser generated Rayleigh Surface Acoustic Waves (SAWs) diagnostic method is proven to be a valuable non-contact and non-destructive evaluation approach to investigate structural properties of materials and is suitable for detecting surface characteristics and/or defects of solid targets, as well as for extracting useful information on features of their underlying layers [1, 2]. In this study, full-field measurement techniques, based on nanosecond dynamic interferometry are employed, for the analysis and characterization of high-frequency ultrafast laser generated SAWs in nanoscale. Gold thin films deposited on a glass substrate are irradiated by femtosecond laser pulses and analysis is carried out with respect to the generated Rayleigh-type waves and their penetration depth in the multilayer material using a pump-probe technique. The dynamic response of the material is also investigated by numerical simulations that combine the Two-Temperature-Model, (TTM model), with the Finite Element Method (FEM) approximation and satisfactory agreement between experimental and numerical results regarding the propagation characteristics of SAWs is observed. Applications of these SAWs in the characterization of surface defects are also demonstrated.
Reference:
Surface Acoustic Waves generated on thin films after irradiation by femtosecond laser pulses (Kaselouris, Evaggelos, Orphanos, Yannis, Kosma, K, Vasillis, Dimitriou, Bakarezos, Makis, Tatarakis, M and Papadogiannis, Nektarios), In , 2018.
Bibtex Entry:
@inproceedings{inpro2018-1,
 author = {Kaselouris, Evaggelos and Orphanos, Yannis and Kosma, K and Vasillis, Dimitriou and Bakarezos, Makis and Tatarakis, M and Papadogiannis, Nektarios},
 year = {2018},
 bibyear = {2018},
 month = {10},
 title = {Surface Acoustic Waves generated on thin films after irradiation by femtosecond laser pulses},
 abstract = {Thin film technology becomes increasingly advanced, with applications covering practically all sectors of industrial activity. This progress in thin-film technology and nanotechnology has come to demand the development of novel, non-invasive material characterization techniques in the micro-and nano-scale. The pulsed laser generated Rayleigh Surface Acoustic Waves (SAWs) diagnostic method is proven to be a valuable non-contact and non-destructive evaluation approach to investigate structural properties of materials and is suitable for detecting surface characteristics and/or defects of solid targets, as well as for extracting useful information on features of their underlying layers [1, 2]. In this study, full-field measurement techniques, based on nanosecond dynamic interferometry are employed, for the analysis and characterization of high-frequency ultrafast laser generated SAWs in nanoscale. Gold thin films deposited on a glass substrate are irradiated by femtosecond laser pulses and analysis is carried out with respect to the generated Rayleigh-type waves and their penetration depth in the multilayer material using a pump-probe technique. The dynamic response of the material is also investigated by numerical simulations that combine the Two-Temperature-Model, (TTM model), with the Finite Element Method (FEM) approximation and satisfactory agreement between experimental and numerical results regarding the propagation characteristics of SAWs is observed. Applications of these SAWs in the characterization of surface defects are also demonstrated.},
 url = {http://eclim2018.mitos.com.gr/},
}