Abstract
Nonlinear optical processes in different systems with ultrasmall semiconductor particles are of significant interest in the connection with observed and expected peculiar optical and electrooptical features. These features are caused first of all that particles size becomes comparable with Bohr exciton radius and, second, properties of ultrasmall particles vary due to environment. Nonlinear optical phenomena of semiconductors like AIIBYI in different media are widely investigated now. These semiconductors have direct transition under excitation that results in the formation of excitons with considerably high binding energy. The nonlinear response features are attributed to two main effects: (1) band filling (energy level filling in the case of quantum-sized particles); (2) generation of electron-hole plasma under the more high pumping. Other mechanisms of nonlinear optical effects considered for such semiconductor particles are — two-photon absorption and induced absorption due to some trapping of carriers (defects, surface states, etc). In the most of cases the latter plays secondary role just affecting the relaxation pathways.
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© 1996 Springer-Verlag Berlin Heidelberg
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Mikhailov, V.P., Yumashev, K.V., Prokoshin, P.V., Malyarevich, A.M. (1996). The Ultrafast Bleaching of CuS Microcrystals. In: Waidelich, W., Hügel, H., Opower, H., Tiziani, H., Wallenstein, R., Zinth, W. (eds) Laser in Forschung und Technik / Laser in Research and Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80263-8_14
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DOI: https://doi.org/10.1007/978-3-642-80263-8_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-61316-9
Online ISBN: 978-3-642-80263-8
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