Nonresonant nonlinear optical response of chalcogenide thin films to picosecond pulses

Raul Rangel-Rojo; Emmanuel Haro-Poniatowski; Antonio Munoz Flores

doi:10.1117/12.231104

5 February 1996 Nonresonant nonlinear optical response of chalcogenide thin films to picosecond pulses

Raul Rangel-Rojo, Emmanuel Haro-Poniatowski, Antonio Munoz Flores

Proceedings Volume 2730, Second Iberoamerican Meeting on Optics; (1996) https://doi.org/10.1117/12.231104
Event: Second Iberoamerican Meeting on Optics, 1995, Guanajuato, Mexico

Abstract

We report the study of the third-order optical nonlinearities of amorphous selenium, using picosecond pulses at 1.064 micrometer, from a mode-locked Nd:YAG laser. The Z-scan technique was used to resolve the absorptive and refractive contributions to the nonlinear response of the material, including their sign. The chosen wavelength lies to the lower photon energy side from the absorption edge for the material studied, the interaction is therefore nonresonant and electronic in origin. We measured an n₂ equals -0.06 cm²GW^-1, with negligible two-photon absorption. We discuss the influence of two photon absorption on the nonlinearity observed.

Citation Download Citation

Raul Rangel-Rojo, Emmanuel Haro-Poniatowski, and Antonio Munoz Flores "Nonresonant nonlinear optical response of chalcogenide thin films to picosecond pulses", Proc. SPIE 2730, Second Iberoamerican Meeting on Optics, (5 February 1996); https://doi.org/10.1117/12.231104

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