Two-photon absorption and nonlinear refraction of amorphous chalcogenide films

We present the characterization of nonlinear optical parameters of chalcogenide films (As2 3, As20S80, 2As2S3/As2 e3, 3As2S3/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 radi...

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Bibliographic Details
Published in:Journal of optics. A, Pure and applied optics Pure and applied optics, 2002-07, Vol.4 (4), p.446-451, Article 313
Main Authors: Ganeev, R A, Ryasnyansky, A I, Kodirov, M K, Usmanov, T
Format: Article
Language:English
Subjects:
Beam trapping, self-focusing and defocusing
self-phase modulation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical susceptibility, hyperpolarizability
Optics
Physics
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Summary:We present the characterization of nonlinear optical parameters of chalcogenide films (As2 3, As20S80, 2As2S3/As2 e3, 3As2S3/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 analyzed numerically the optical limiting of chalcogenide films due to the Kerr-induced nonlinearities, and in the case of 2As2S3/As2Se3 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 As2S3. We discuss the variations of nonlinear optical properties of chalcogenide films. (Author)
ISSN:1464-4258
1741-3567
DOI:10.1088/1464-4258/4/4/313