Dependence on dimensionality of excitonic optical nonlinearity in quantum confined structures

T. Takagahara

doi:10.1016/0038-1098(91)90197-4

Dependence on dimensionality of excitonic optical nonlinearity in quantum confined structures

T. Takagahara

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

The dependence on dimensionality of the excitonic optical nonlinearity and the figures of merit in quantum confined structures is clarified for the resonant third-order optical nonlinearity. An important parameter which determines the dimensionality dependence of the figures of merit is found to be the ratio of the homogeneous linewidth to the exciton binding energy or the ratio of the exciton coherence length to the exciton Bohr radius. It is predicted that for the III-V compound semiconductors the exciton confinement in low-dimensional structures (d=1,2 d:dimensionality) is favorable for enhancing the figures of merit, whereas for the I-VII compound semiconductors the exciton confinement does not always improve the figures of merit.

Original language	English
Pages (from-to)	279-282
Number of pages	4
Journal	Solid State Communications
Volume	78
Issue number	4
DOIs	https://doi.org/10.1016/0038-1098(91)90197-4
Publication status	Published - 1991 Apr
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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AB - The dependence on dimensionality of the excitonic optical nonlinearity and the figures of merit in quantum confined structures is clarified for the resonant third-order optical nonlinearity. An important parameter which determines the dimensionality dependence of the figures of merit is found to be the ratio of the homogeneous linewidth to the exciton binding energy or the ratio of the exciton coherence length to the exciton Bohr radius. It is predicted that for the III-V compound semiconductors the exciton confinement in low-dimensional structures (d=1,2 d:dimensionality) is favorable for enhancing the figures of merit, whereas for the I-VII compound semiconductors the exciton confinement does not always improve the figures of merit.

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