9 July 2007 Reflection and absorption dynamics in periodic nanostructures based on ZnS/ZnSe
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ZnS/ZnSe heterostructures under condition of ZnSe interband excitation by a 150 fs 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 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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S. A. Tikhomirov, S. A. Tikhomirov, M. V. Ermolenko, M. V. Ermolenko, V. V. Stankevich, V. V. Stankevich, O. V. Buganov, O. V. Buganov, S. V. Gaponenko, S. V. Gaponenko, P. I. Kuznetsov, P. I. Kuznetsov, G. G. Yakushcheva, G. G. Yakushcheva, } "Reflection and absorption dynamics in periodic nanostructures based on ZnS/ZnSe", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 672708 (9 July 2007); doi: 10.1117/12.752230; https://doi.org/10.1117/12.752230

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