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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geprüft am 17.05.2024