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Photoinduced Electron Transfer Counter to the Bias Field in Coupled Quantum Wells

Published online by Cambridge University Press:  21 February 2011

Mark I. Stockman ,
Leonid S. Muratov ,
Lakshmi N. Pandey  and
Thomas F. George
Mark I. Stockman
Affiliation:
Departments of Physics and Chemistry, Washington State University, Pullman, Washington 99164-2814
Leonid S. Muratov
Affiliation:
Departments of Physics and Chemistry, Washington State University, Pullman, Washington 99164-2814
Lakshmi N. Pandey
Affiliation:
Departments of Physics and Chemistry, Washington State University, Pullman, Washington 99164-2814
Thomas F. George
Affiliation:
Departments of Physics and Chemistry, Washington State University, Pullman, Washington 99164-2814
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Abstract

Optical excitation of electrons in an asymmetric double quantum well is theoretically examined. The well is biased to align the excited levels and permit resonant electron tunneling. Emphasis is made on the photoinduced transfer of electrons counter to the bias electric field force. A density-matrix approach is developed to describe optical excitations in the presence of an arbitrary dephasing. The excitation profiles obtained for cases of different dephasing reveal the full range of tunneling coupling between the wells from completely coherent to incoherent (stepwise).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 261: Symposium D – Photo-Induced Space Charge Effects in Semiconductors: Electro-Optics, Photoconductivity and the Photorefractive Effect , 1992 , 125
Copyright
Copyright © Materials Research Society 1992

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References

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