PHOTOREFRACTIVE RESPONSE CHARACTERISTICS AND GENERATION OF PHASE-CONJUGATE WAVE IN BI12GEO20 AND BI12SIO20 CRYSTALS

Authors
YOSHIHARA T UESU Y HIKITA K IIZUKA H
Citation
T. Yoshihara et al., PHOTOREFRACTIVE RESPONSE CHARACTERISTICS AND GENERATION OF PHASE-CONJUGATE WAVE IN BI12GEO20 AND BI12SIO20 CRYSTALS, JPN J A P 1, 32(9B), 1993, pp. 4296-4299
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
32
Issue
9B
Year of publication
1993
Pages
4296 - 4299
Database
ISI
SICI code
Abstract
The response time of the photorefractive effect in Bi12GeO20 was evalu ated for the first time using nearly degenerate two-wave mixing. The r esult was analyzed in the context of the charge transport theory and t he trap density was determined as N(A) = 2.4 x 10(21) m-3. It Was also found that an optimum amplitude of the displacement of the piezomirro r exists in the moving-grating method. By adopting this amplitude, the reflectivities of the phase-conjugate wave reached 490% and 430% for Bi12SiO20 and Bi12GeO20, respectively.