Ultrafast spectroscopy of semiconductor Bragg reflectors

M. V. Ermolenko; S. A. Tikhomirov; V. V. Stankevich; O. V. Buganov; S. V. Gaponenko; P. I. Kuznetsov; G. G. Yakuscheva

doi:10.1117/12.722688

8 May 2007 Ultrafast spectroscopy of semiconductor Bragg reflectors

M. V. Ermolenko, S. A. Tikhomirov, V. V. Stankevich, O. V. Buganov, S. V. Gaponenko, P. I. Kuznetsov, G. G. Yakuscheva

Author Affiliations +

Proceedings Volume 6582, Nonlinear Optics and Applications II; 65821H (2007) https://doi.org/10.1117/12.722688
Event: International Congress on Optics and Optoelectronics, 2007, Prague, Czech Republic

Abstract

ZnS/ZnSe Bragg reflectors under condition of ZnSe interband excitation by a femtosecond laser pulse exhibit strong narrow-band modification of absorption and wide-band modification of reflection. Mean decay time for nonlinear reflection in heterostructures ranges from 2 to 3 ps whereas in bare ZnSe monolayer it exceeds 5 ps. Possible underlying physical processes responsible for nonlinear refraction in the transparency region include interplay of absorption driven nonlinear refraction via Kramers-Kronig relations and intrinsic dielectric properties of dense electron-hole plasma. For nonlinear absorption at ZnSe band edge, interplay of plasma screening effects and states filling effects are relevant.

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M. V. Ermolenko, S. A. Tikhomirov, V. V. Stankevich, O. V. Buganov, S. V. Gaponenko, P. I. Kuznetsov, and G. G. Yakuscheva "Ultrafast spectroscopy of semiconductor Bragg reflectors", Proc. SPIE 6582, Nonlinear Optics and Applications II, 65821H (8 May 2007); https://doi.org/10.1117/12.722688

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