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Nonlinear Optical Properties of Ladder Polymers and Their Model Compound

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The third order nonlinear optical properties of thin films of polybenzimidazobenzophenanthroline ladder (BBL) and semi-ladder (BBB) polymers and their model compound cis-BBB were investigated by picosecond, third harmonic generation. The χ(3) (-3ω, ω, ω,ω) spectrum of BBL, BBB, and cis-BBB was obtained in the wavelength range 1.0–2.4µm and shown to exhibit a three-photon peak at respectively 1.695, 1.695, and 1.50 µm. The magnitude of the three-photon enhanced χ(3) was 6.40×10-11, 3.15×10-11, and 0.77×10-11 esu, respectively, for BBL, BBB, and cis—BBB. The results show that the χ(3) of BBL and BBB is enhanced by a factor of 50 and 17, respectively, relative to the model compound cis—BBB at 1.05µm.

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Acknowledgement

Work at the University of Rochester was supported by NSF under Science and Technology Center for Photoinduced Charge Transfer, Grant CHE—881—0024, and by a grant from Amoco Foundation.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Rochester, Rochester, NY, 14627

    Samson A. Jenekhe, Michael Roberts & Ashwini K. Agrawal

  2. Central Research and Development Department, The Du Pont Company, P.O. Box 80356, Wilmington, DE, 19880-0356

    Jeffrey S. Meth & Herman Vanherzeele

Authors
  1. Samson A. Jenekhe
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  2. Michael Roberts
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  3. Ashwini K. Agrawal
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  4. Jeffrey S. Meth
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  5. Herman Vanherzeele
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Jenekhe, S.A., Roberts, M., Agrawal, A.K. et al. Nonlinear Optical Properties of Ladder Polymers and Their Model Compound. MRS Online Proceedings Library 214, 55–59 (1990). https://doi.org/10.1557/PROC-214-55

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  • DOI: https://doi.org/10.1557/PROC-214-55

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