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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 4 — Apr. 1, 1998
  • pp: 1366–1374

Photorefractive space-charge field with running grating and applied sinusoidal ac electric field: solution for all time scales

Per Michael Johansen and Henrik C. Pedersen  »View Author Affiliations


JOSA B, Vol. 15, Issue 4, pp. 1366-1374 (1998)
http://dx.doi.org/10.1364/JOSAB.15.001366


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Abstract

We present the first complete theoretical model that describes the formation of the space-charge field in a photorefractive material that is exposed to a sinusoidal ac electric field with a dc offset and a running light-interference pattern. The model is complete in the sense that it is valid for all time scales and hence also covers situations in which the well-known period-averaging technique is inapplicable. For large temporal frequencies of the ac electric field the solution is shown to converge with that obtained from the period-averaging technique. It is shown that by imposing a running interference pattern and a sinusoidal ac electric field simultaneously, it becomes possible to enhance certain frequency components selectively. Experiments are performed to confirm the theoretical findings, and good agreement is obtained.

© 1998 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics

Citation
Per Michael Johansen and Henrik C. Pedersen, "Photorefractive space-charge field with running grating and applied sinusoidal ac electric field: solution for all time scales," J. Opt. Soc. Am. B 15, 1366-1374 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-4-1366

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