Ultrafast nonlinear absorption and reflection of ZnS/ZnSe periodic nanostructures
| Autor: | G. G. Yakushcheva, Sergey V. Gaponenko, P. I. Kuznetsov, M. V. Ermolenko, V. V. Stankevich, O. V. Buganov, Sergei A. Tikhomirov |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Condensed matter physics business.industry Physics::Optics Nonlinear optics Heterojunction Plasma Dielectric Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Optics Reflection (mathematics) Hardware and Architecture Electrical and Electronic Engineering business Absorption (electromagnetic radiation) Ultrashort pulse Photonic crystal |
| Zdroj: | Photonics and Nanostructures - Fundamentals and Applications. 5:101-105 |
| ISSN: | 1569-4410 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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