LASER-INDUCED TRANSIENT GRATINGS IN LINBO3-FE

Autor(en): JERMANN, F
BUSE, K
SIMON, M
KRATZIG, E
Stichwörter: CHARGE-TRANSPORT; Materials Science; Materials Science, Multidisciplinary; Optics
Erscheinungsdatum: 1995
Herausgeber: ELSEVIER SCIENCE BV
Journal: OPTICAL MATERIALS
Volumen: 4
Ausgabe: 2-3
Startseite: 318
Seitenende: 321
Zusammenfassung: 
Holographic gratings are recorded in LiNbO3:Fe using frequency-doubled pulses of a Q-switched Nd:YAG laser (light wavelength lambda = 532 nm, pulse duration t(p) = 20 ns). We monitor diffraction efficiencies of the holograms during and several milliseconds after exposure. Variations of Fe2+ concentration, light intensity, and fringe spacing show that different types of gratings are involved: amplitude, thermo-optic, pyroelectric, and space-charge gratings. The influence of the internal pyroelectric field on the light-induced charge transport is discussed in terms of a two-center model. Pyroelectric and bulk photovoltaic effect partially compensate each other. In LiNBO3:Fe the photovoltaic effect is the dominant charge driving force for our recording conditions.
Beschreibung: 
Symposium on Photorefractive Materials, at the E-MRS 1994 Spring Meeting, STRASBOURG, FRANCE, MAY 24-26, 1994
ISSN: 09253467
DOI: 10.1016/0925-3467(94)00079-4

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