Abstract
We report effect of external ac-field on photorefractive properties of CdTe:Ge at 1.06μm. Phenomena related to excitation of the space-charge waves (SCW) of traps recharging, such as spatial subharmonics generation and resonant two-beam coupling, are studied. Dramatic enhancement of the photorefractive response is achieved in ac-biased crystal by adjustment of recording conditions (field and grating spacing) to eigen resonance related to excitation of the space charge waves.
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