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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 27 — Sep. 20, 2012
  • pp: 6653–6660

Photoinduced grating formation in a polymer containing azo-carbazole dyes

Yutaka Kawabe, Kodai Fukuzawa, Takuya Uemura, Katsufumi Matsuura, Toshio Yoshikawa, Jun-ichi Nishide, and Hiroyuki Sasabe  »View Author Affiliations


Applied Optics, Vol. 51, Issue 27, pp. 6653-6660 (2012)
http://dx.doi.org/10.1364/AO.51.006653


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Abstract

Although some azo-carbazole derivatives attached on or doped into inert polymers are known to show photorefractive effect without external electric field, the origin of their asymmetric energy transfer in two-beam coupling experiments were unknown. We made the two-beam coupling experiment followed by sample translation and one-beam diffraction at 633 nm for thick films composed of 3-[(4-nitrophenyl)]azo-9H-carbazole-9-ethanol (NACzEtOH) and poly(methylmethacrylate), finding that photoinduced gratings grew in several minutes accompanied with phase displacement of the gratings, but the phase shift was not always synchronized with the refractive index modulation. We reformulated the Kogelnik’s coupled-wave theory with strict energy conservation law for analysis. Comparison of the grating growth and erasure at 532 nm to Disperse Red 1 (DR1), the most well-known azo dye showed that the photoisomerization was dominant at this wavelength and that the azo-carbazole dyes were faster in response time and more resistive to erasure than DR1.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(090.7330) Holography : Volume gratings
(160.4330) Materials : Nonlinear optical materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.5330) Nonlinear optics : Photorefractive optics
(190.2055) Nonlinear optics : Dynamic gratings

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 18, 2012
Revised Manuscript: August 6, 2012
Manuscript Accepted: August 16, 2012
Published: September 20, 2012

Citation
Yutaka Kawabe, Kodai Fukuzawa, Takuya Uemura, Katsufumi Matsuura, Toshio Yoshikawa, Jun-ichi Nishide, and Hiroyuki Sasabe, "Photoinduced grating formation in a polymer containing azo-carbazole dyes," Appl. Opt. 51, 6653-6660 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-27-6653

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