Мақола

Two-photon absorption and nonlinear refraction of amorphous chalcogenide films

R. A. GaneevNPO Akadempribor, Academy of Science of Uzbekistan, Tashkent 700143, UzbekistanA.I. RyasnyanskySamarkand State University, Samarkand 703004, UzbekistanМ. К. КодировSamarkand State University, Samarkand 703004, UzbekistanT. UsmanovNPO Akadempribor, Academy of Science of Uzbekistan, Tashkent 700143, Uzbekistan

Journal of Optics A Pure and Applied Opticsjournal2002en

ABI

Аннотация

We present the characterization of nonlinear optical parameters of chalcogenide films (As2 S3, As20 S80, 2As2 S3/As2 Se3, 3As2 S3/As2 Se3). We have measured their nonlinear refractive indices and two-photon absorption coefficients using the Z-scan method at the wavelengths of picosecond Nd:YAG laser radiation (1064 nm and 532 nm). We have analysed numerically the optical limiting of chalcogenide films due to the Kerr-induced nonlinearities, and in the case of 2As2 S3/As2 Se3 we found 12.5-fold limiting. We present the experimental results on optical limiting due to two-photon absorption. We obtained 25-fold optical limiting in the case of As2 S3. We discuss the variations of nonlinear optical properties of chalcogenide films.

Мавзулар

Nonlinear Optical Materials Studies Phase-change materials and chalcogenides Nonlinear Optical Materials Research

Идентификаторлар

DOI: 10.1088/1464-4258/4/4/313

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