Enhancement of the two-photon absorption and nonlinear-optical refraction in mesoporous silicon

The mode-locked Nd:YAG laser radiation (1.064 mum, 40 ps) transmitted through the samples was employed to study the two-photon absorption and nonlinear refraction of porous silicon. The mesoporous Si sample demonstrates self-focusing. The nonlinear refraction at low laser intensities and two-photon...

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Bibliographic Details
Main Authors: Golovan, L.A., Kopylovsky, M.A., Zabotnov, S.V., Piskunov, N.A., Gayvoronsky, V.Ya, Kashkarov, P.K., Timoshenko, V.Yu
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Birefringence
Crystallization
Infrared spectra
Mesoporous materials
Nonlinear optics
Optical films
Optical materials
Optical refraction
Silicon
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Summary:The mode-locked Nd:YAG laser radiation (1.064 mum, 40 ps) transmitted through the samples was employed to study the two-photon absorption and nonlinear refraction of porous silicon. The mesoporous Si sample demonstrates self-focusing. The nonlinear refraction at low laser intensities and two-photon absorption at high laser intensities are sensitive to the laser radiation polarization. The light self-action mechanism demonstrated at low intensities tends to be saturated.
DOI:10.1109/CLEOE-EQEC.2009.5196537