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Title: Optical properties of spontaneous lateral composition modulations in AlAs/InAs short-period superlattices

Abstract

The effect of lateral composition modulation, spontaneously generated during the epitaxial growth of a AlAs/InAs short-period superlattice, on the electronic band structure is investigated using photo-transmission and photoluminescence spectroscopy. Compared with uniform layers of similar average composition, the presence of the composition modulation considerably reduces the band gap energy and produces strongly polarized emission and absorption spectra. The authors demonstrate that the dominant polarization can selectively be aligned along the [{bar 1}10] or [010] crystallographic directions. In compressively strained samples, the use of (001) InP substrates slightly miscut toward [111]A or [101] resulted in modulation directions along [110] or [100], respectively, and dominant polarizations along a direction orthogonal to the respective composition modulation. Band gap reduction as high as 350 meV and 310 meV are obtained for samples with composition modulation along [110] and [100], respectively. Polarization ratios up to 26 are observed in transmission spectra.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755604
Report Number(s):
SAND2000-1197J
TRN: AH200021%%49
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Other Information: Submitted to Applied Physics Letters; PBD: 11 May 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ARSENIDES; INDIUM ARSENIDES; EPITAXY; SUPERLATTICES; ELECTRONIC STRUCTURE; ENERGY GAP; POLARIZATION; OPTICAL PROPERTIES

Citation Formats

FRANCOEUR,S., ALSINA,F., ZHANG,YONG, NORMAN,A.G., MASCARENHAS,A., JONES,ERIC D., RENO,JOHN L., LEE,STEPHEN R., and FOLLSTAEDT,DAVID M. Optical properties of spontaneous lateral composition modulations in AlAs/InAs short-period superlattices. United States: N. p., 2000. Web. doi:10.1063/1.1311598.
FRANCOEUR,S., ALSINA,F., ZHANG,YONG, NORMAN,A.G., MASCARENHAS,A., JONES,ERIC D., RENO,JOHN L., LEE,STEPHEN R., & FOLLSTAEDT,DAVID M. Optical properties of spontaneous lateral composition modulations in AlAs/InAs short-period superlattices. United States. doi:10.1063/1.1311598.
FRANCOEUR,S., ALSINA,F., ZHANG,YONG, NORMAN,A.G., MASCARENHAS,A., JONES,ERIC D., RENO,JOHN L., LEE,STEPHEN R., and FOLLSTAEDT,DAVID M. Thu . "Optical properties of spontaneous lateral composition modulations in AlAs/InAs short-period superlattices". United States. doi:10.1063/1.1311598. https://www.osti.gov/servlets/purl/755604.
@article{osti_755604,
title = {Optical properties of spontaneous lateral composition modulations in AlAs/InAs short-period superlattices},
author = {FRANCOEUR,S. and ALSINA,F. and ZHANG,YONG and NORMAN,A.G. and MASCARENHAS,A. and JONES,ERIC D. and RENO,JOHN L. and LEE,STEPHEN R. and FOLLSTAEDT,DAVID M.},
abstractNote = {The effect of lateral composition modulation, spontaneously generated during the epitaxial growth of a AlAs/InAs short-period superlattice, on the electronic band structure is investigated using photo-transmission and photoluminescence spectroscopy. Compared with uniform layers of similar average composition, the presence of the composition modulation considerably reduces the band gap energy and produces strongly polarized emission and absorption spectra. The authors demonstrate that the dominant polarization can selectively be aligned along the [{bar 1}10] or [010] crystallographic directions. In compressively strained samples, the use of (001) InP substrates slightly miscut toward [111]A or [101] resulted in modulation directions along [110] or [100], respectively, and dominant polarizations along a direction orthogonal to the respective composition modulation. Band gap reduction as high as 350 meV and 310 meV are obtained for samples with composition modulation along [110] and [100], respectively. Polarization ratios up to 26 are observed in transmission spectra.},
doi = {10.1063/1.1311598},
journal = {Applied Physics Letters},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}