Two-Photon Absorption in Nanoheterostructures with D (−)-Centers

Author： Krevchik V.   Yashin S.  

Publisher： Springer Publishing Company

ISSN： 1064-8887

Source： Russian Physics Journal, Vol.48, Iss.7, 2005-07, pp. : 718-722

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Abstract

A two-photon impurity absorption coefficient of the “quantum dot — D(−)-center” complexes synthesized in a transparent dielectric matrix is calculated within the model of zero-radius potential. The evolution of spectral dependence of the absorption coefficient of the nanoheterostructure based on semiconductor CdS x Se 1−x glasses is studied versus the average quantum-dot radius. It is shown that the contribution of the two-photon impurity absorption to the exited two-photon luminescence is fairly significant at a reasonable quantum-dot concentration.

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