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Subband Structure and Optical Transitions in a Superlattice with Electron Quasi-Localised States in Unit Cell

Published online by Cambridge University Press:  15 February 2011

A.V. Dmitriev  and
V.V. Makeev
A.V. Dmitriev
Affiliation:
Department of Low Temperature Physics, the Faculty of Physics, Moscow State University, Moscow, 119899, Russia; dmitrievalt.phys.msu.su
V.V. Makeev
Affiliation:
Department of Low Temperature Physics, the Faculty of Physics, Moscow State University, Moscow, 119899, Russia
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Abstract

We studied theoretically the electron spectrum and infrared transitions in a superlattice with a unit cell allowing for quasi-localised carrier states. The dispersion relation and the band structure of such a system have been found. We also calculated the dipole matrix element for inter-subband carrier infrared transitions. The wave functions and the electron spectrum in this superlattice show a peculiarity when the energy of a band state approaches the energy of the quasi-localised state in the single cell. In particular, the absorption strength peaks up at the respective frequencies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 579: Symposium B – The Optical Properties of Materials , 1999 , 193
Copyright
Copyright © Materials Research Society 2000

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