Title: Photorefractive properties of undoped lithium tantalate crystals for various composition
Authors: Holtmann, F.
Imbrock, J.
Bäumer, Ch.
Hesse, H.
Krätzig, E.
Kip, Detlef  
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik
Issue Date: Dec-2004
Publisher: American Inst. of Physics
Document Type: Article
Journal / Series / Working Paper (HSU): Journal of applied physics : AIP's archival journal for significant new results in applied physics 
Volume: 96
Issue: 12
Page Start: 7455
Page End: 7459
Publisher Place: Melville, NY
Lithium tantalate crystals of compositions ranging from 48.3 mol % to 50.0 mol % lithium oxide are fabricated by vapor transport equilibration. Light-induced refractive index changes of the crystals are investigated with holographic methods at usual cw-laser intensities (≈ 105 W/m 2) and with a single focused laser beam at high light intensities up to 2 × 107 W/m2. In stoichiometric crystals the index changes are reduced by more than two orders of magnitude when compared with congruently melting ones. Simultaneously, the normalized photoconductivity σph/I, where I is the light intensity, increases by nearly two orders of magnitude. Therefore, stoichiometric lithium tantalate is an attractive material for applications such as frequency conversion via quasi-phase matching. © 2004 American Institute of Physics.
Organization Units (connected with the publication): Technische Universität Clausthal
URL: https://api.elsevier.com/content/abstract/scopus_id/11044236769
ISSN: 00218979
DOI: 10.1063/1.1805189
Appears in Collections:Publications of the HSU Researchers (before HSU)

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