title: Electrical fixing in near-stoichiometric lithium niobate crystals.
abstract: Photorefractive gratings are recorded in lithium niobate crystals in the presence of externally applied electric fields close to the coercive field. After optical erasure a voltage pulse above the poling threshold is applied, and by these means a photorefractive grating reappears that can be erased optically. The results point to electrical fixing, i.e., ferroelectric domain reversal induced by a space-charge field.
authors.affiliation: Physikalisches Institut, Universität Bonn, Wegelerstrasse 8, D-53115 Bonn, Germany. eggerth@web.de
authors.forename: Helge A
authors.initials: HA
authors.lastname: Eggert
authors.forename: Benedikt
authors.initials: B
authors.lastname: Hecking
authors.forename: Karsten
authors.initials: K
authors.lastname: Buse