A new method of electrical fixing in strontium-barium niobate crystals

Wesner, M.; Herden, C.; Kip, Detlef

doi:10.1364/PEMD.2001.152

A new method of electrical fixing in strontium-barium niobate crystals

Publication date

2001

Document type

Conference paper

Author

Wesner, M.

Herden, C.

Kip, Detlef

Organisational unit

Universität Osnabrück

DOI

10.1364/PEMD.2001.152

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/14072

Conference

Photorefractive Effects, Materials, and Devices 2001

Publisher

Optical Society of America

Series or journal

OSA trends in optics and photonics : TOPS

ISBN

1-55752-693-1

Part of the university bibliography

Nein

Language

English

Abstract

We suggest a new method of electrical fixing in strontium-barium niobate (SEN) crystals. The method takes advantage of the large difference of the extraordinary refractive index in poled compared to unpoled SEN samples. A SEN crystal that is locally depolarized can guide extraordinarily polarized light inside the depoled crystal areas. A local depoling of the crystal is achieved with the help of light-induced screening of an externally applied electric field. By applying a suitable external electric field, the polarization can be reversed outside the illuminated area, while the reversal inside is prevented. At the boarders between illuminated and non-illuminated regions depolarized areas can form, resulting in waveguiding channels for extraordinarily polarized light.

© 2001 Optical Society of America

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