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Linear and nonlinear optical properties of excitons in semiconductor-dielectric quantum wires

Chernoutsan, K., Dneprovskii, V., Gavrilov, S., Gusev, V., Muljarov, Egor A., Romanov, S., Syrnicov, A., Shaligina, O. and Zhukov, E. 2002. Linear and nonlinear optical properties of excitons in semiconductor-dielectric quantum wires. Physica E: Low-dimensional Systems and Nanostructures 15 (3) , pp. 111-117. 10.1016/S1386-9477(02)00442-3

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Abstract

The characteristic features of the absorption, luminescence and photoluminescence excitation spectra of InP nanocrystals crystallized in chrysotile asbestos nanotubes and CdS nanocrystals crystallized in hollow channels of a dielectric template have been explained in terms of exciton transitions in semiconductor–dielectric quantum wires. In these structures, the dielectric confinement effect leads to a considerable increase of the exciton binding energy—the Coulomb attraction between electron and hole is considerably enhanced as a result of the difference between the permittivities of the semiconductor and insulator. The kinetics of porous InP photoluminescence at high excitation by picosecond laser pulses has been explained by the slowing down of the intraband energy relaxation, collective exciton–exciton (electron) interaction and Auger recombination in nanostructures.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Elsevier
ISSN: 1386-9477
Last Modified: 04 Jun 2017 05:06
URI: http://orca.cf.ac.uk/id/eprint/48520

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