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EFFECT OF PIPERAZINE GROUP IN SIDE-CHAIN AZOBENZENE POLYMER ON SECOND-ORDER OPTICAL NONLINEARITY BY ALL-OPTICAL POLING

B. Guo1,2,* , J. Liu2, Y. J. Jia3, G. M.Wang3, Q. J. Zhang2

Affiliation

  1. aStructure Research Laboratory , University of Science and Technology of China, Hefei 230026, China
  2. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  3. Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China

Abstract

All-optical poling of a piperazine substituted and no piperazine substituted side-chain azobenzene polymer of poly [6-[1-(4-(4-nitrophenylazo) phenyl) piperazine] hexyl methacrylate](Pda) and poly [6-(4-(4-cyanophenylazo) phenyloxy) hexyl methacrylate] (PCN6) were investigated. Optimum relative intensity of the two seeding beams was found first. The second-order non-linear optical (NLO) susceptibility of Pda was improved significantly than that of PCN6, the maximum d33 at saturation of Pda could be enhanced about 10 times. The normalized relaxation process of the SHG (second-harmonic generation) signal from a PCN6 film and a Pda film was also observed and explained by their donor-acceptor strength and length of side chain, at last, using short flexible spacer in Pda to enhance further the temporal stability was proposed..

Keywords

Piperazine group, Polymer, All-optical poling.

Submitted at: Nov. 30, 2004
Accepted at: March 23, 2005

Citation

B. Guo, J. Liu, Y. J. Jia, G. M.Wang, Q. J. Zhang, EFFECT OF PIPERAZINE GROUP IN SIDE-CHAIN AZOBENZENE POLYMER ON SECOND-ORDER OPTICAL NONLINEARITY BY ALL-OPTICAL POLING, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 1017-1021 (2005)