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Polarized Cathodoluminescence Study of (InP)2/(GaP)2 Bilayer Superlattice Structures

Published online by Cambridge University Press:  15 February 2011

Y. Tang ,
K. Rammohan ,
H.T. Lin ,
D.H. Rich ,
P. Colter  and
S.M. Vernon
Y. Tang
Affiliation:
Department of Materials Science and Engineering, University of Souathern California, Los Angeles, CA 90089-0241
K. Rammohan
Affiliation:
Department of Materials Science and Engineering, University of Souathern California, Los Angeles, CA 90089-0241
H.T. Lin
Affiliation:
Department of Materials Science and Engineering, University of Souathern California, Los Angeles, CA 90089-0241
D.H. Rich
Affiliation:
Department of Materials Science and Engineering, University of Souathern California, Los Angeles, CA 90089-0241
P. Colter
Affiliation:
Spire Corporation, Bedford, MA 01730
S.M. Vernon
Affiliation:
Spire Corporation, Bedford, MA 01730
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Abstract

Linearly polarized cathodoluminescence (LPCL) imaging and spectroscopy techniques have been employed to examine the optical properties and homogeneity of (InP)2/(GaP)2 bilayer superlattice (BSL) structures which exhibit a lateral composition modulation that leads to the formation of quantum wires. LPCL spectra were measured for various temperature and electron beam excitation densities. The magnitude of the polarization anisotropy and spectral lineshape are found to depend sensitively on the excitation conditions, revealing large nonlinear optical effects in these samples. CL images reveal that defects in the bilayer superlattice structure originate from the GaAs substrate or the initial stages of InGaP growth.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 379: Symposium C – Strained Layer Epitaxy–Materials, Processing, and Devise Applications , 1995 , 165
Copyright
Copyright © Materials Research Society 1995

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References

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