Optical hysteresis and nonlinear absorption of laser pulses in a-As2S3

Valentin N. Ciumash; G. Bostan; Ion A. Cojocaru; P. Cerbari

doi:10.1117/12.203547

8 March 1995 Optical hysteresis and nonlinear absorption of laser pulses in a-As₂S₃

Valentin N. Ciumash, G. Bostan, Ion A. Cojocaru, P. Cerbari

Proceedings Volume 2461, ROMOPTO '94: Fourth Conference in Optics; (1995) https://doi.org/10.1117/12.203547
Event: ROMOPTO '94: 4th Conference on Optics, 1994, Bucharest, Romania

Abstract

Results of the experimental investigations of the nonlinear absorption of microsecond laser pulses in thin amorphous As₂S₃ films are presented. The optical transmission hysteresis at interband excitation of As₂S₃ films in a blue-green spectral region is reported for the first time. A reversible film photodarkening induced in the field of laser pulses was registered. It was suggested that the interband nonlinear light absorption could be explained by taking into account the light interaction with nonequilibrium phonons.

Citation Download Citation

Valentin N. Ciumash, G. Bostan, Ion A. Cojocaru, and P. Cerbari "Optical hysteresis and nonlinear absorption of laser pulses in a-As₂S₃", Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); https://doi.org/10.1117/12.203547

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