COUPLING OF ORTHOGONALLY POLARIZED WAVES IN BATIO3

Autor(en): HOLTMANN, L
KRATZIG, E
ODOULOV, S
Stichwörter: DIFFRACTION; OSCILLATION; PHOTOREFRACTIVE CRYSTALS; Physics; Physics, Applied; SCATTERING
Erscheinungsdatum: 1991
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY
Volumen: 53
Ausgabe: 1
Startseite: 1
Seitenende: 5
Zusammenfassung: 
The first observation of anisotropic diffraction (with a 90-degrees change of the polarization of the diffracted wave) in BaTiO3 from a grating recorded by two orthogonally polarized waves, an ordinary and an extraordinary wave, is reported. Three possible origins of this effect are considered: (i) direct one-step diffraction from a grating recorded anisotropically by spatially oscillating photovoltaic currents, (ii) indirect, sequential diffraction from two gratings, each recorded by one incident wave and an additional wave due to light-induced scattering, (iii) direct one-step diffraction from a grating with the grating vector equal to the difference of the grating vectors of two conjugated ``noisy'' gratings. The experimental evidence indicates that the process (iii) contributes most, and process (i) more than 10% to the overall diffraction efficiency, whereas process (ii) seems to be of minor importance.
ISSN: 07217269
DOI: 10.1007/BF00325473

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