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 SM ISO690:2012CHUMASH, Valentin, BOSTAN, Gheorghe, COJOCARU, Ion, MINCU, Niculae, CERBARI, Pavel. Nonlinear absorption of laser pulses in amorphous and crystalline As2S3 thin films. In: Proceedings of SPIE - The International Society for Optical Engineering, Ed. 1, 11-13 mai 1995, Kiev. Bellingham, Washington: SPIE, 1995, Vol.2648, pp. 221-225. ISBN 0819420212. ISSN 0277-786X. DOI: https://doi.org/10.1117/12.226170 |
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 Proceedings of SPIE - The International Society for Optical Engineering Vol.2648, 1995 |
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Conferința "Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics" 1, Kiev, Ucraina, 11-13 mai 1995 | ||||||
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| DOI:https://doi.org/10.1117/12.226170 | ||||||
| Pag. 221-225 | ||||||
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Result of the experimental investigations of absorption of laser pulses in amorphous (a-) and crystalline (c-) As2S3 films are presented. The optical transmission hysteresis and reversible film photodarkening at interband excitation of a-As2S3 films in a blue-green spectral region are reported. It was suggested that the nonlinear light absorption could be explained by taking into account the light interaction with nonequilibrium localized lattice vibrations anharmonically coupled with the extended phonons. The measurements of peculiarities of the pulse absorption in crystalline As2S3 films can confirm the proposed explanation. |
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| Cuvinte-cheie Engineering controlled terms Laser pulses, Lattice vibrations, Light absorption, Light transmission, Nanocrystalline materials, thin films, Amorphous films, Arsenic compounds, Crystals, hysteresis, laser pulses, Light transmission, Phonons Engineering uncontrolled terms Experimental investigations, Inter-band excitations, Light interaction, Measurements of, Non equilibrium, Nonlinear absorptions, Spectral region, Blue-green spectral region, Interband excitation, Photodarkening Engineering main heading Arsenic compounds, Light absorption |
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