Michl, F. C. and Winkler, R. and Rössler, Ulrich (1996) Exciton transfer in asymmetric double quantum wells: the one-LO phonon process. Solid State Communications 99 (1), pp. 13-18.
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We propose a novel mechanism for the transfer of excitons as an entity through barriers in quantum well structures, namely by the emission of a single longitudinal optical (LO) phonon. The process arises from a combination of the Fröhlich coupling of electrons and holes to the LO phonons and the admixture of different subband states to the wave function of the excitons due to the Coulomb interaction. For the case of an asymmetric double quantum well, a numerical calculation of the resulting relaxation rates is given. We show that the process can dominate over the separate transfer of electrons and holes.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler|
|Keywords:||A. semiconductors; A. quantum wells; D. tunnelling|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:56|