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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Published inCLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference p. 1
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
LanguageEnglish
Published IEEE 01.06.2009
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.
ISBN:1424440793
9781424440795
DOI:10.1109/CLEOE-EQEC.2009.5196537