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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 17 — Sep. 1, 2009
  • pp: 2554–2556

Optical switching of liquid-crystal polarization gratings with nanosecond pulses

Uladzimir Hrozhyk, Sarik Nersisyan, Svetlana Serak, Nelson Tabiryan, Landa Hoke, Diane M. Steeves, and Brian R. Kimball  »View Author Affiliations


Optics Letters, Vol. 34, Issue 17, pp. 2554-2556 (2009)
http://dx.doi.org/10.1364/OL.34.002554


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Abstract

Optical switching with single nanosecond laser pulses of 532 nm wavelength is reported using high-efficiency optical axis gratings made with a nematic liquid crystal doped with an azobenzene dye. The azobenzene dye we have synthesized exhibits enhanced photosensitivity at green wavelengths, allowing for low threshold switching ( 10 mJ cm 2 ) . The dye is also characterized by fast relaxation of isomers, allowing for restoration of the diffractive properties of the grating within 100 ms . Change of the diffraction efficiency of the zeroth-order beam from 10% to 70% is observed in a micrometer-thick material layer.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(140.3380) Lasers and laser optics : Laser materials
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: May 5, 2009
Revised Manuscript: July 22, 2009
Manuscript Accepted: July 26, 2009
Published: August 19, 2009

Citation
Uladzimir Hrozhyk, Sarik Nersisyan, Svetlana Serak, Nelson Tabiryan, Landa Hoke, Diane M. Steeves, and Brian R. Kimball, "Optical switching of liquid-crystal polarization gratings with nanosecond pulses," Opt. Lett. 34, 2554-2556 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-17-2554

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