Title :
Dipolar photorefractive gratings in paraelectric K/sub 1-x/Li/sub x/Ta/sub 1-y/Nb/sub y/O/sub 3/
Author :
Razvag, M. ; Balberg, M. ; Agranat, A.J.
Author_Institution :
Dept. of Appl. Phys., Hebrew Univ., Jerusalem, Israel
Abstract :
Summary form only given. We present experimental results indicating photorefractive (PR) space-charge gratings, that are formed in the paraelectric phase, induce dipolar gratings that are not erased by direct illumination. The experiments were done using potassium lithium tantalate niobate (KLiTaNbO/sub 3/), with a phase transition at T=170 K.
Keywords :
dielectric materials; diffraction gratings; lithium compounds; photorefractive materials; potassium compounds; solid-state phase transformations; space charge; tantalum compounds; 170 K; K/sub 1-x/Li/sub x/Ta/sub 1-y/Nb/sub y/O/sub 3/; KLiTaNbO/sub 3/; dipolar gratings; dipolar photorefractive gratings; direct illumination; paraelectric materials; paraelectric phase induce dipolar gratings; phase transition; photorefractive space-charge gratings; potassium lithium tantalate niobate; Crystals; Dielectric constant; Diffraction; Gratings; Monitoring; Niobium; Optimized production technology; Photorefractive effect; Polarization; Writing;
Conference_Titel :
Lasers and Electro-Optics, 1996. CLEO '96., Summaries of papers presented at the Conference on
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-443-2
