Enhancement of the photorefractive effect by homogeneous pyroelectric fields

Autor(en): Korneev, N
Mayorga, D
Stepanov, S
Gerwens, A
Buse, K
Kratzig, E
Stichwörter: GRATINGS; INDUCED CHARGE-TRANSPORT; Optics; Physics; Physics, Applied; SR0.61BA0.39NB2O6-CE
Erscheinungsdatum: 1998
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 66
Ausgabe: 3
Startseite: 393
Seitenende: 396
Zusammenfassung: 
Spatially uniform heating or cooling of a photorefractive strontium-barium niobate crystal yields large pyroelectric fields. Two-beam coupling measurements and observation of beam intensity profiles behind the crystal reveal that drift of charge carriers in the pyroelectric field strongly enhances the photorefractive effect. Illumination by a continuous wave laser beam causes large pyroelectric fields via absorption and heating. The drift in pyroelectric fields must be taken into account as a transport mechanism if pyroelectric crystals are used. This mechanism is promising for novel photorefractive devices.
ISSN: 09462171
DOI: 10.1007/s003400050407

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