Band-edge refractive optical nonlinearities in molecular beam-grown ZnSe epilayers

J. A. Bolger, I. Galbraith, A. K. Kar, J. Simpson, S. Y. Wang, K. A. Prior, B. C. Cavenett, B. S. Wherrett

Research output: Contribution to journalArticle

Abstract

We report novel measurements of the room temperature refractive optical nonlinearities in a molecular beam epitaxy-grown ZnSe epilayer at frequencies near to the band edge. Time-resolved changes in the transmission spectrum due to a two-photon generated plasma of free carriers are monitored with a broad-band white-light continuum probe. The refractive index changes, measured for photon energies between 0.8 and 0.05 eV below the free-exciton line at 2.68 eV, with photoexcited carrier densities of (2-5)×1018 cm-3, are found to be in good agreement with a many-body plasma calculation.

Original languageEnglish
Pages (from-to)709-711
Number of pages3
JournalApplied Physics Letters
Volume63
Issue number6
DOIs
Publication statusPublished - 1993

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