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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 7 — Jul. 1, 1999
  • pp: 1080–1086

Speed enhancement of photorefractive polymers by means of light-induced filling of trapping states

Janpeter Wolff, Stefan Schloter, Uwe Hofmann, Dietrich Haarer, and Stephan J. Zilker  »View Author Affiliations


JOSA B, Vol. 16, Issue 7, pp. 1080-1086 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001080


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Abstract

The fastest organic photorefractive materials show response times in the millisecond range. The origin of this limit is not yet fully understood. Charge-carrier generation and transport processes and reorientation of the nonlinear-optical chromophores may play an important role. We characterize a new photorefractive guest–host polymer by cw two-beam coupling, as well as by cw and pulsed four-wave mixing experiments. The latter were used to determine unambiguously the response time of the material. We show that a decrease of the response time by a factor of 1000 can be achieved by illuminating the sample with a strong cw beam during pulsed exposure. A model of the enhancement process backed by dc photoconductivity measurements is presented.

© 1999 Optical Society of America

OCIS Codes
(040.5150) Detectors : Photoconductivity
(090.2900) Holography : Optical storage materials
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics

Citation
Janpeter Wolff, Stefan Schloter, Uwe Hofmann, Dietrich Haarer, and Stephan J. Zilker, "Speed enhancement of photorefractive polymers by means of light-induced filling of trapping states," J. Opt. Soc. Am. B 16, 1080-1086 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-7-1080


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