Title: Photorefractive properties of lithium and copper in-diffused lithium niobate crystals
Authors: Imbrock, Jörg
Wirp, Albert
Kip, Detlef  
Krätzig, Eckhard
Berben, Dirk
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik
Issue Date: 2002
Publisher: Soc.
Document Type: Article
Journal / Series / Working Paper (HSU): Journal of the Optical Society of America B 
Volume: 19
Issue: 8
Page Start: 1822
Page End: 1829
Publisher Place: Washington, DC
Near-stoichiometric copper-doped lithium niobate crystals are fabricated by in-diffusion of thin layers of evaporated copper and a subsequent vapor transport equilibration treatment. The crystals are heated in a Li-rich atmosphere to increase the Li content. To determine the photorefractive properties, holographic as well as electrical measurements are performed. Saturation values of the refractive-index changes ΔnS, bulk photovoltaic current densities jphv, photoconductivities σ ph, and holographic sensitivities S are measured for light intensities up to 104 W/m2. Comparison with experimental data of congruent crystals indicates that the specific photoconductivity is 15 times larger after a vapor transport equilibration treatment. The specific bulk photovoltaic coefficient β* is 2 times larger, refractive-index changes are 7 times smaller, and the holographic sensitivity is up to 4 times larger. © 2002 Optical Society of America.
Organization Units (connected with the publication): Universität Osnabrück
URL: https://api.elsevier.com/content/abstract/scopus_id/0141563659
ISSN: 07403224
DOI: 10.1364/JOSAB.19.001822
Appears in Collections:Publications of the HSU Researchers (before HSU)

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