X-ray-induced photochromic effects in copper-doped lithium niobate crystals

Autor(en): Berben, D
Andreas, B
Buse, K
Stichwörter: CHARGE TRANSPORT; LINBO3; Optics; Physics; Physics, Applied
Erscheinungsdatum: 2001
Herausgeber: SPRINGER-VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 72
Ausgabe: 6
Startseite: 729
Seitenende: 732
Zusammenfassung: 
X-Ray-induced absorption changes in Cu-doped lithium niobate crystals (LiNbO3) are investigated. All induced photochromic effects are fully reversible, i.e., illumination with white light annihilates the absorption changes. With increasing doping level, a decrease in the saturation value of the absorption changes is found. Changes of the Li concentration of the crystal to a more stoichiometric composition via Li indiffusion further decreases the photochromic effect. For sufficient X-ray doses, the saturation value is independent of the radiation energy in the measured range from 50-150 kV. The spectral distribution of the X-ray-induced absorption changes and the slow dark decay indicate that the additional absorption results from an increase of the Cu+ concentration.
ISSN: 09462171
DOI: 10.1007/s003400100558

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