title: Reversible polarized bleaching in hydrogenated rare-earth-doped fluorites.
abstract: By using site-selective laser spectroscopy, several sites in hydrogenated and deuterated rare-earth-doped fluorite crystals have been found to exhibit reversible bleaching. The site orientations can be switched between orthogonal directions by corresponding changes in the laser polarization. Such effects are a form of photochemical hole burning and are attributed to laser-induced migration of H(-) or D(-) ions between equivalent interstitial positions adjacent to the rare-earth ion.
authors.forename: N J
authors.initials: NJ
authors.lastname: Cockroft
authors.forename: T P
authors.initials: TP
authors.lastname: Han
authors.forename: R J
authors.initials: RJ
authors.lastname: Reeves
authors.forename: G D
authors.initials: GD
authors.lastname: Jones
authors.forename: R W
authors.initials: RW
authors.lastname: Syme