Picosecond photorefractive beam coupling in GaAs
- 1 October 1986
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 11 (10), 647-649
- https://doi.org/10.1364/ol.11.000647
Abstract
We report the first observation to our knowledge of the photorefractive effect on picosecond time scales. Photorefractive beam coupling in GaAs with picosecond, 1.06-μm pulses is observed owing to charge separation between electrons and the ionized defect EL2+ at low fluences and to separation between free electrons and holes created by two-photon interband absorption for high fluences. The accompanying processes of linear absorption, two-photon absorption, and transient energy transfer are also observed.Keywords
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