Published March 1999
| Published
Journal Article
Open
Transient enhancement of photorefractive gratings in lead germanate by homogeneous pyroelectric fields
Abstract
During holographic recording in pure (Pb5Ge3O11) and doped [(Pb1−xBax)5Ge3O11] lead germanate crystals, the diffraction efficiency is transiently enhanced at the initial stage. The enhancement is studied as a function of writing-beam intensity and of dark delay time between two successive recording processes and with open- or short-circuited crystal surfaces. Homogeneous pyroelectric fields that arise from heating of the crystals by cw illumination are revealed to be the main mechanism for diffraction efficiency enhancement. The combined effect of pyroelectric fields and charge compensation is analyzed and used for the explanation of the observed phenomena.
Additional Information
© 1999 Optical Society of America. Received August 11, 1998; revised manuscript received November 2, 1998. Financial support by the Deutsche Forschungsgemeinschaft (SFB 225, A1, A6) and the Friedrich-Ebert-Stiftung are gratefully acknowledged.Attached Files
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Additional details
- Eprint ID
- 12722
- Resolver ID
- CaltechAUTHORS:YUEjosab99
- SFB 225, A1, A6
- Deutsche Forschungsgemeinschaft (DFG)
- Friedrich-Ebert-Stiftung
- Created
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2008-12-21Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field