Characterization of a new photorefractive material: K1−yLyT1−xNx

Aharon Agranat, Rudy Hofmeister, Amnon Yariv

Research output: Contribution to journalArticlepeer-review

121 Scopus citations


We report the growth and characterization of a new photorefractive material, potassium lithium tantalate niobate (KLTN). A KLTN crystal doped with copper is demonstrated to yield high diffraction efficiency of photorefractive gratings in the paraelectric phase. Voltage-controllable index gratings with n1, = 8.5 × 10−5 were achieved, which yielded diffraction efficiencies of 75% in a 2.9-mm-thick sample. In addition, diffraction was observed in the paraelectric phase without an applied field. This effect is attributed to a growth-induced strain field.

Original languageAmerican English
Pages (from-to)713-715
Number of pages3
JournalOptics Letters
Issue number10
StatePublished - 15 May 1992


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