L773:0022 2313
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Exciton levels and optical absorption in coupled double quantum well structures
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- Arapan, Sergiu (author)
- Uppsala universitet,Fysiska institutionen,Fysik IV
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- Liberman, Michael (author)
- Uppsala universitet,Fysiska institutionen,Fysik IV
- (creator_code:org_t)
- Elsevier BV, 2005
- 2005
- English.
- In: Journal of Luminescence. - : Elsevier BV. - 0022-2313. ; 112:1-4, s. 216-219
- Journal article (peer-reviewed)
Abstract
Subject headings
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- We study exciton states in a coupled double quantum well (CDQW) semiconductor structure. Exciton levels and binding energies of direct and indirect excitons are calculated for a symmetric CDQW system with an applied electric field. The exciton states are obtained by solving the exciton effective-mass equation in the momentum space using the modified Gaussian quadrature method. Within this approach we perform realistic calculations of the exciton states by taking into account the coupling between different subband pairs and calculate optical-absorption coefficients. The calculated values of the exciton binding energy are in a good agreement with the experiment and the calculated absorption spectra qualitatively agree with the measured photoluminescence excitation spectra.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Coupled quantum wells
- Absorption spectra
- Mesoscopic physics
- Mesoskopisk fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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