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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 11 — Nov. 1, 2003
  • pp: 2307–2312

Highly efficient photorefractive composites based on layered photoconductive polymers

O-Pil Kwon, Suck-Hyun Lee, Germano Montemezzani, and Peter Günter  »View Author Affiliations


JOSA B, Vol. 20, Issue 11, pp. 2307-2312 (2003)
http://dx.doi.org/10.1364/JOSAB.20.002307


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Abstract

High-performance photorefractive materials based on the layered photoconductive polymers PPT-CZ [rigid backbone of poly(p-phenyleneterephthalate) with pendent carbazole groups] are studied. The composites are composed of PPT-CZ and are doped with the sensitizer C60 and nonlinear optical chromophores. Despite the absence of a plasticizer and the lower concentration of the carbazole photoconductive moieties as compared with poly(N-vinyl carbazole), these materials show high photorefractive sensitivity, i.e., Sn2 of 70± 7 cm2/kJ at E0=100 V/μm for PPT-CZ(n=12):diethylaminodicyanostyrene:C60. The low glass transition temperature (<0°C) leads to a high rotational mobility of the chromophores that results in large refractive-index changes. For all the composites that were investigated, the two-wave mixing gain Γ exceeds 100 cm−1 at an applied field of 50 V/μm.

© 2003 Optical Society of America

OCIS Codes
(160.5140) Materials : Photoconductive materials
(160.5320) Materials : Photorefractive materials
(160.5470) Materials : Polymers
(190.5330) Nonlinear optics : Photorefractive optics

Citation
O-Pil Kwon, Suck-Hyun Lee, Germano Montemezzani, and Peter Günter, "Highly efficient photorefractive composites based on layered photoconductive polymers," J. Opt. Soc. Am. B 20, 2307-2312 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-11-2307


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