photorefractive effect


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Related to photorefractive effect: Photovoltaic effect

photorefractive effect

[‚fōd·ō·ri′frak·tiv i′fekt]
(optics)
An effect displayed by many electrooptic materials in which a change in the index of refraction is induced by the presence of light, and this change is retained for a time after the light exposure ceases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The photorefractive effect was first observed as "optical damage" to LiNb[O.sub.3] and other crystals used in electro-optic devices, according to Martin Liphardt of the Univ.
When focused down to the dimensions of optical wave-guides, the resulting high power densities ([10.sub.4] to [10.sub.5] W/[cm.sup.2]) can sufficiently modify the properties of the waveguide material (photorefractive effect).
"Until the past few years, all materials showing the photorefractive effect were inorganic crystals," he says.