Influence of exciton impact ionization and illumination intensity on the exciton-polariton reflectance of GaAs
- 15 October 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 18 (8) , 4325-4331
- https://doi.org/10.1103/physrevb.18.4325
Abstract
External electric fields cause impact ionization of excitons in GaAs. We investigated the influence of impact ionization on exciton-polariton reflectance spectra. The change in the reflectance spectra due to the external field is similar to the change obtained by reducing the illumination intensity to very small values. This joint behavior is explained in terms of band bending near the crystal surface and related damping of the exciton polariton.Keywords
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