Photorefractive effect produced by photoinduced metastable changes in the dielectric constant

A. Agranat*, Y. Yacoby

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Experimental evidence indicating a new mechanism for the photorefractive effect is presented. A new experimental technique enabling the distinction between this mechanism and the space-charge mechanism is described. It is shown that illumination-induced changes in the refractive index of KTa1-xNbxO3 in the paraelectric phase result from metastable changes in the dielectric constant. A possible microscopic model attributing these changes in the dielectric constant to changes in the phase-transition temperature is discussed. Quantitative comparison between the two mechanisms in KTa1-xNbxO3 is presented and the application potential of the new mechanism is discussed.

Original languageAmerican English
Pages (from-to)5712-5716
Number of pages5
JournalPhysical Review B
Volume27
Issue number9
DOIs
StatePublished - 1983

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