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

Published online by Cambridge University Press:  25 February 2011

Lina Yang ,
R. Dorsinville ,
R. Zamboni ,
C. Taliani ,
R. Tubino  and
R. R. Alfano
Lina Yang
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers, Departments of Electrical Engineering and Physics, The City College of the City University of New York, New York 10031
R. Dorsinville
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers, Departments of Electrical Engineering and Physics, The City College of the City University of New York, New York 10031
R. Zamboni
Affiliation:
Insituto di Spettroscopia Molecolare Consiglio Nazionale delle Ricerche Via de’ Castagnoli 1, 40126 Bologna, Italy
C. Taliani
Affiliation:
Insituto di Spettroscopia Molecolare Consiglio Nazionale delle Ricerche Via de’ Castagnoli 1, 40126 Bologna, Italy
R. Tubino
Affiliation:
Istituto di Fisica dell’Univcrsita, Via Vienna 2, Sassari, Italy
R. R. Alfano
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers, Departments of Electrical Engineering and Physics, The City College of the City University of New York, New York 10031
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 173: Symposium Q – Advanced Organic Solid State Materials , 1989 , 631
Copyright
Copyright © Materials Research Society 1990

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References

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