CHARGE TRANSPORT PROCESSES IN LINBO3FE AT HIGH-INTENSITY LASER-PULSES

Autor(en): JERMANN, F
KRATZIG, E
Stichwörter: Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied
Erscheinungsdatum: 1992
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volumen: 55
Ausgabe: 1
Startseite: 114
Seitenende: 118
Zusammenfassung: 
Light-induced refractive index changes in LiNbO3 : Fe crystals are investigated at high light intensities (> 10(9) W m-2). Holographic gratings are recorded and erased with frequency-doubled pulses of a Q-switched Nd : YAG laser. We find new intensity dependent contributions to the holographic sensitivity, to the photoconductivity, and to the saturation value of refractive index change. Light-induced absorption changes are also detected. These results indicate that the Fe2+/Fe3+ charge transport model, well established for low intensities, has to be modified for high intensities by assuming additional centers which trap and supply electrons.
ISSN: 09478396
DOI: 10.1007/BF00324611

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