ELECTRON-PARAMAGNETIC-RESONANCE STUDIES OF PHOTOREFRACTIVE CRYSTALS .2. FE3-VAPOR LASER ILLUMINATION IN 10-100 K RANGE( DOPED BI12SIO20 WITH COPPER)

Authors
PORWAL NK KADAM RM BABU Y SASTRY MD AGGARWAL MD VENKATESWARLU P
Citation
Nk. Porwal et al., ELECTRON-PARAMAGNETIC-RESONANCE STUDIES OF PHOTOREFRACTIVE CRYSTALS .2. FE3-VAPOR LASER ILLUMINATION IN 10-100 K RANGE( DOPED BI12SIO20 WITH COPPER), Pramana, 48(4), 1997, pp. 929-935
Citations number
7
Categorie Soggetti
Physics
Journal title
Pramana → ACNP
ISSN journal
03044289
Volume
48
Issue
4
Year of publication
1997
Pages
929 - 935
Database
ISI
SICI code
0304-4289(1997)48:4<929:ESOPC.>2.0.ZU;2-I
Abstract
Photo-induced charge transfer and its kinetics were investigated in Bi 12SiO20 in 10-300 K temperature range, using EPR of Fe3+ centre, under in situ illumination with copper vapour laser (CVL). The decay kineti cs was found to follow double exponential behaviour. Relaxation of the photo-induced electron transfer to the preillumination condition occu rred even at 10 K. Shallow traps were, therefore, associated with the electron trapping, leading to a better understanding of the fast photo refractive response of BSO.