LIGHT-INDUCED CHARGE-TRANSPORT PROCESSES IN PHOTOREFRACTIVE CRYSTALS .1. MODELS AND EXPERIMENTAL METHODS

Authors
Citation
K. Buse, LIGHT-INDUCED CHARGE-TRANSPORT PROCESSES IN PHOTOREFRACTIVE CRYSTALS .1. MODELS AND EXPERIMENTAL METHODS, Applied physics. B, Lasers and optics, 64(3), 1997, pp. 273-291
Citations number
203
Categorie Soggetti
Physics, Applied",Optics
ISSN journal
09462171
Volume
64
Issue
3
Year of publication
1997
Pages
273 - 291
Database
ISI
SICI code
0946-2171(1997)64:3<273:LCPIPC>2.0.ZU;2-E
Abstract
Light-induced charge transport processes are essential for photorefrac tive effects in electrooptic crystals. Charge driving forces, charge t ransport models and experimental methods for investigation of charge t ransport processes are reviewed. - Drift, bulk photovoltaic currents a nd diffusion are the charge driving forces. The one-center model witho ut and with electron-hole competition and two-level models, i.e., the two-center model and the three-valence model, are described. The speci al features of the different models in the case of homogeneous and inh omogeneous illumination are pointed out. Methods for reliable measurem ents of absorption, light induced absorption changes, dark and photoco nductivities, amplitude and phase of refractive index and absorption g ratings, and of charge carrier mobilities are presented.