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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 11 — Nov. 1, 2008
  • pp: 1931–1937

Theory and experimental studies of all-optical transmission switching in a twist-alignment dye-doped nematic liquid crystal

Iam-Choom Khoo, Jae-Hong Park, and Justin D. Liou  »View Author Affiliations


JOSA B, Vol. 25, Issue 11, pp. 1931-1937 (2008)
http://dx.doi.org/10.1364/JOSAB.25.001931


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Abstract

We present a theoretical model and experimental demonstration of an all-optical switching process occurring in twist alignment dye-doped nematic liquid crystal cells. A Landau–deGennes theory is applied together with the thermal buildup and diffusion equation to analyze the laser-induced temperature, the order parameter, and the birefringence changes in the liquid crystal cell. The resulting transmission switching processes are calculated using a modified Jones matrix method. Experimental observations of the switching processes in cells of varying thicknesses and their dependence on the input optical power are in good agreement with theoretical predictions. We have also studied the dynamics of the switching processes and observed microseconds switching times. These studies demonstrate the possibility of low-threshold power and microseconds speed switching applications.

© 2008 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.4330) Materials : Nonlinear optical materials
(160.6840) Materials : Thermo-optical materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(230.3720) Optical devices : Liquid-crystal devices
(230.4320) Optical devices : Nonlinear optical devices

ToC Category:
Materials

History
Original Manuscript: August 8, 2008
Revised Manuscript: September 9, 2008
Manuscript Accepted: September 23, 2008
Published: October 31, 2008

Citation
Iam-Choom Khoo, Jae-Hong Park, and Justin D. Liou, "Theory and experimental studies of all-optical transmission switching in a twist-alignment dye-doped nematic liquid crystal," J. Opt. Soc. Am. B 25, 1931-1937 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-11-1931

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