Citation
M. Carrascosa et al., Photorefractive gratings generated by band-gap excitation: Application to KNbO3, APP PHYS B, 72(6), 2001, pp. 697-700
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS B-LASERS AND OPTICS
ISSN journal
09462171
→ ACNP
Volume
72
Issue
6
Year of publication
2001
Pages
697 - 700
Database
ISI
SICI code
0946-2171(200105)72:6<697:PGGBBE>2.0.ZU;2-J
Abstract
A simple model was developed to account for the generation of thin space-ch
arge gratings induced by bandgap illumination in photorefractive crystals.
It includes the high-intensity regime where the contribution of free carrie
rs to the space-charge field cannot be neglected. The model was specificall
y applied to explain the occurrence of two mutually pi -phase-shifted grati
ngs below the surface of KNbO3 as well as diffraction features that have be
en previously observed experimentally.