Photorefractive two-beam coupling characterization of a barium-calcium titanate crystal

Authors
Bernhardt, S Delaye, P Veenhuis, H Rytz, D Roosen, G
Citation
S. Bernhardt et al., Photorefractive two-beam coupling characterization of a barium-calcium titanate crystal, APP PHYS B, 70(6), 2000, pp. 789-795
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS B-LASERS AND OPTICS
ISSN journal
09462171 → ACNP
Volume
70
Issue
6
Year of publication
2000
Pages
789 - 795
Database
ISI
SICI code
0946-2171(200006)70:6<789:PTCCOA>2.0.ZU;2-J
Abstract
We present two-beam coupling characterization of Ba0.77Ca0.23TiO3, a ferroe lectric material with no phase transition around room temperature that show s high photorefractive gain (7 cm(-1) with ordinary polarization and 15 cm( -1) with extraordinary polarization). We measure the electrooptic coefficie nts of Ba0.77Ca0.23TiO3. These values are compared to estimated theoretical values, calculated using a model that allows one to deduce the tetragonal phase parameter (Pockels and piezoelectric coefficients) from the parameter s of the high-temperature cubic phase (Kerr and electrostriction coefficien ts).