Energy Transfer of Excitons Between Quantum Wells Separated by a Wide Barrier

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Description

We present a microscopic theory of the excitonic Stokes and anti-Stokes energy transfer mechanisms between two widely separated unequal quantum wells with a large energy mismatch ({Delta}) at low temperatures (T). Exciton transfer through dipolar coupling, photon-exchange coupling and over-barrier ionization of the excitons through exciton-exciton Auger processes are examined. The energy transfer rate is calculated as a function of T and the center-to-center distance d between the two wells. The rates depend sensitively on T for plane-wave excitons. For located excitons, the rates depend on T only through the T-dependence of the localization radius.

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Medium: P; Size: 63 pages

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LYO,SUNGKWUN K. December 6, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

We present a microscopic theory of the excitonic Stokes and anti-Stokes energy transfer mechanisms between two widely separated unequal quantum wells with a large energy mismatch ({Delta}) at low temperatures (T). Exciton transfer through dipolar coupling, photon-exchange coupling and over-barrier ionization of the excitons through exciton-exciton Auger processes are examined. The energy transfer rate is calculated as a function of T and the center-to-center distance d between the two wells. The rates depend sensitively on T for plane-wave excitons. For located excitons, the rates depend on T only through the T-dependence of the localization radius.

Physical Description

Medium: P; Size: 63 pages

Notes

INIS; OSTI as DE00015165

Source

  • Journal Name: Physical Review B; Other Information: Submitted to Physical Review B

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  • Report No.: SAND99-3110J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 15165
  • Archival Resource Key: ark:/67531/metadc619556

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  • December 6, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 11, 2016, 4:25 p.m.

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LYO,SUNGKWUN K. Energy Transfer of Excitons Between Quantum Wells Separated by a Wide Barrier, article, December 6, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc619556/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.