Title: Transient enhancement of photorefractive gratings in lead germanate by homogeneous pyroelectric fields
Authors: Yue, Xuefeng
Mendricks, S.
Nikolajsen, T.
Hesse, H.
Kip, Detlef  
Krätzig, E.
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik
Issue Date: 1999
Publisher: Soc.
Document Type: Article
Journal / Series / Working Paper (HSU): Journal of the Optical Society of America : JOSA B, Optical physics 
Volume: 16
Issue: 3
Page Start: 389
Page End: 394
Publisher Place: Washington, DC
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 openor 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. © 1999 Optical Society of America.
Organization Units (connected with the publication): Universität Osnabrück
URL: https://api.elsevier.com/content/abstract/scopus_id/0347180261
ISSN: 07403224
DOI: 10.1364/JOSAB.16.000389
Appears in Collections:Publications of the HSU Researchers (before HSU)

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