Comparative study of composition dependences of photorefractive and related effects in LiNbO₃ and LiTaO₃ crystals

Publication date
2007-12
Document type
Conference paper
Author
Kostritskii, S. M.
Sevostyanov, O. G.
Bourson, P.
Aillerie, M.
Fontana, M. D.
Organisational unit
Technische Universität Clausthal
DOI
URI
Scopus ID
ISSN
Conference
8th European Conference on Applications of Polar Dielectrics ECAPD'8
Series or journal
Ferroelectrics
Periodical volume
352
Periodical issue
1
First page
61
Last page
71
Part of the university bibliography
Nein
Abstract
The results of a comparative study of composition dependences of the light-induced refractive index change, photorefractive sensitivity, polaron luminescence, and intrinsic optical absorption in nominally pure LiNbO 3 and LiTaO3 crystals are reported. Our investigation demonstrates that the particular light-induced defects traced by the photoluminescence are secondary photorefractive centers itself. The experimental results obtained are well described by light-induced dissociation of bipolarons into small polarons that are unstable at room temperature.
Version
Not applicable (or unknown)
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