Dipolar holographic gratings induced by the photorefractive process in potassium lithium tantalate niobate at the paraelectric phase

Aharon J. Agranat*, Meir Razvag, Michal Balberg, Victor Leyva

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We present experimental evidence indicating the formation of dipolar holographic gratings in potassium lithium tantalate niobate at the paraelectric phase slightly above the phase transition. These gratings are formed in the dark, following the writing of space-charge-based photorefractive gratings, under an external electric field. The dipolar gratings create a spatial modulation of the low-frequency dielectric constant, and the latter induces a spatially correlated modulation of the polarization, which is transformed into birefringence gratings through the quadratic electro-optic effect.

Original languageAmerican English
Pages (from-to)2043-2048
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Volume14
Issue number8
DOIs
StatePublished - Aug 1997

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