Understanding the optical and electrical properties of a new photorefractive potassium niobate crystal

Optical and electrical measurements have been made on a new codoped potassium niobate crystal that yields a significant increase in linear absorption, photocurrent, and photorefractive beam coupling efficiency. The Ag impurity enters the K site, changing the local field in the lattice. The Fe in the...

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Bibliographic Details
Published in:Journal of luminescence 2006-07, Vol.119, p.535-540
Main Authors: Evans, D.R., Cook, G., Carns, J.L., Saleh, M.A., Basun, S.A., Seim, J.M., Mizell, G.J.
Format: Article
Language:English
Subjects:
Photorefractive
Photovoltaic
Potassium niobate
Two-beam coupling
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Summary:Optical and electrical measurements have been made on a new codoped potassium niobate crystal that yields a significant increase in linear absorption, photocurrent, and photorefractive beam coupling efficiency. The Ag impurity enters the K site, changing the local field in the lattice. The Fe in the Nb site, perturbed by the replacement of the next near-neighbor K with Ag, is responsible for the enhanced linear and nonlinear properties. The modified material parameters result in an increase of the photorefractive counter-propagating two-beam coupling efficiency.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2006.01.059