skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Quasi-one-dimensional excitons in lateral surface-induced superlattices

Abstract

We study the effects of an electrostatic potential designed to induce a lateral periodic modulation in a quantum well. The resulting superlattice, for small periods, is a system where quasi-one-dimensional excitons can tunnel from one effective potential well to the next and exhibit a unique center-of-mass folded dispersion which should be accessible to photoluminescence experiments. An effective-mass envelope-function approach is used to estimate resulting excitonic minibands, binding energies, and absorption coefficients for the ground and first few excited states of heavy-hole excitons. For strong electrostatic confinement, this configuration strongly polarizes the excitons, resembling a type-II superlattice where electrons and holes are spatially separated in different potential wells. A competition between quantum structural confinement and Coulomb interactions is evident in the exciton features. (c) 2000 The American Physical Society.

Authors:
 [1];  [2]
  1. Instituto de Fisica Universidad Autonoma de Puebla, Apartado Postal J-48, Puebla 72570, (Mexico)
  2. Department of Physics and Astronomy and Condensed Matter and Surface Sciences Program, Ohio University, Athens, Ohio 45701-2979 (United States)
Publication Date:
OSTI Identifier:
20216427
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 61; Journal Issue: 19; Other Information: PBD: 15 May 2000; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERLATTICES; EXCITONS; ONE-DIMENSIONAL CALCULATIONS; TUNNEL EFFECT; PHOTOLUMINESCENCE; EFFECTIVE MASS; ELECTRONIC STRUCTURE; BINDING ENERGY; ABSORPTION SPECTRA; POLARIZATION; THEORETICAL DATA

Citation Formats

Cocoletzi, G. H., and Ulloa, S. E. Quasi-one-dimensional excitons in lateral surface-induced superlattices. United States: N. p., 2000. Web. doi:10.1103/PhysRevB.61.13099.
Cocoletzi, G. H., & Ulloa, S. E. Quasi-one-dimensional excitons in lateral surface-induced superlattices. United States. doi:10.1103/PhysRevB.61.13099.
Cocoletzi, G. H., and Ulloa, S. E. Mon . "Quasi-one-dimensional excitons in lateral surface-induced superlattices". United States. doi:10.1103/PhysRevB.61.13099.
@article{osti_20216427,
title = {Quasi-one-dimensional excitons in lateral surface-induced superlattices},
author = {Cocoletzi, G. H. and Ulloa, S. E.},
abstractNote = {We study the effects of an electrostatic potential designed to induce a lateral periodic modulation in a quantum well. The resulting superlattice, for small periods, is a system where quasi-one-dimensional excitons can tunnel from one effective potential well to the next and exhibit a unique center-of-mass folded dispersion which should be accessible to photoluminescence experiments. An effective-mass envelope-function approach is used to estimate resulting excitonic minibands, binding energies, and absorption coefficients for the ground and first few excited states of heavy-hole excitons. For strong electrostatic confinement, this configuration strongly polarizes the excitons, resembling a type-II superlattice where electrons and holes are spatially separated in different potential wells. A competition between quantum structural confinement and Coulomb interactions is evident in the exciton features. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevB.61.13099},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 19,
volume = 61,
place = {United States},
year = {2000},
month = {5}
}