Polarized cathodoluminescence study of (InP)2/(GaP)2 bilayer superlattice structures

Y. Tang, K. Rammohan, H. T. Lin, D. H. Rich, P. Colter, S. M. Vernon

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

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.

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume379
DOIs
StatePublished - 1 Jan 1995
Externally publishedYes
EventProceedings of the 1995 MRS Spring Meeting - San Francisco, CA, USA
Duration: 17 Apr 199520 Apr 1995

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