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Conferences > QWOE > 1989 > MA > MA3

Van Hove Type M1 Exciton and Stark Localization Exciton in GaAs-AlGaAs Superlattices under an Electric Field

R. H. Yan, R. J. Simes, H. Ribot, L. A. Coldren, and A. C. Gossard

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Abstract

A field-dependent two-dimensional exciton due to a Van Hove type M1 singularity at the top of superlattice minibands has been observed in MBE grown superlattices for the first time at room temperature. The largest ever-reported room temperature two-dimensional heavy hole exciton shift up to ~30meV was observed by field-dependent photocurrent measurements.

© 1989 Optical Society of America

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