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Enhanced Third Order Optical Nonlinear Response in Polythiophene Films—Polaron Contributions

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Abstract

The enhancement of the third order nonlinear susceptibility χ(3)) of an homologous series of polycondensed thiophene based polymers was observed about photoinduced polaronic bands by a novel “pump-probe” degenerate four wave mixing echnique. Enhancement of the degenerate four wave mixing signal for more than an order of magnitude was achieved with response time of less than 25 ps. The intrachain polarons contribution is proposed as the possible mechanism responsible for the observed enhancement.

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Authors and Affiliations

  1. Departments of Electrical Engineering and Physics, Institute for Ultrafast Spectroscopy and Lasers, The City College of the City University of New York, 10031, New York, USA

    Lina Yang, R. Dorsinville & R. R. Alfano

  2. Insituto di Spettroscopia Molecolare Consiglio Nazionale delle Ricerche, Via de’ Castagnoli 1, 40126, Bologna, Italy

    R. Zamboni & C. Taliani

  3. Istituto di Fisica dell’Univcrsita, Via Vienna 2, Sassari, Italy

    R. Tubino

Authors
  1. Lina Yang
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  2. R. Dorsinville
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  3. R. Zamboni
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  4. C. Taliani
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  5. R. Tubino
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  6. R. R. Alfano
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Yang, L., Dorsinville, R., Zamboni, R. et al. Enhanced Third Order Optical Nonlinear Response in Polythiophene Films—Polaron Contributions. MRS Online Proceedings Library 173, 631–636 (1989). https://doi.org/10.1557/PROC-173-631

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  • DOI: https://doi.org/10.1557/PROC-173-631

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