Yue, Xuefeng and Mendricks, S. and Nikolajsen, T. and Hesse, H. and Kip, D. and Krätzig, E. (1999) Transient enhancement of photorefractive gratings in lead germanate by homogeneous pyroelectric fields. Journal of the Optical Society of America B, 16 (3). pp. 389-394. ISSN 0740-3224 http://resolver.caltech.edu/CaltechAUTHORS:YUEjosab99
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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.|
|Official Citation:||X. Yue, S. Mendricks, T. Nikolajsen, H. Hesse, D. Kip, and E. Krätzig, "Transient enhancement of photorefractive gratings in lead germanate by homogeneous pyroelectric fields," J. Opt. Soc. Am. B 16, 389-394 (1999) http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-3-389|
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|Deposited On:||21 Dec 2008 04:31|
|Last Modified:||26 Dec 2012 10:39|
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