2-WAVE COUPLING IN PHOTOREFRACTIVE TRANSITION-METAL DOPED POTASSIUM-SODIUM BARIUM STRONTIUM NIOBATE CRYSTALS

Authors
ZHU DR ZHANG YL MO D
Citation
Dr. Zhu et al., 2-WAVE COUPLING IN PHOTOREFRACTIVE TRANSITION-METAL DOPED POTASSIUM-SODIUM BARIUM STRONTIUM NIOBATE CRYSTALS, Acta physica Sinica, 5(9), 1996, pp. 670-676
Citations number
16
Categorie Soggetti
Physics
Journal title
Acta physica Sinica → ACNP
ISSN journal
10003290
Volume
5
Issue
9
Year of publication
1996
Pages
670 - 676
Database
ISI
SICI code
1000-3290(1996)5:9<670:2CIPTD>2.0.ZU;2-X
Abstract
Large values of the exponential gain coefficient are obtained (Gamma = 8-20 cm(-1)) in photorefractive potassium sodium barium strontium nio bate crystals doped with transition metal elements: Co, Cu, Fe, Cr and Ni by using two-wave coupling experiments with argon ion laser (lambd a = 488 nm). The response time is measured to be 60-1000 ms at an inte nsity of 5 W/cm(2) for various samples. We find that in all the crysta ls electrons are the dominant photorefractive charge carriers, and the typical density of carriers is 10(16)-10(17) cm(-3).