Spectroscopic investigation of the electro-optic nonlinearity in poly(2,5-thienylene vinylene)
- 15 January 1992
- journal article
- letter
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 71 (2) , 1064-1066
- https://doi.org/10.1063/1.350401
Abstract
We report the results of a spectroscopic investigation of the quadratic electro‐optic nonlinearity in poly(2,5‐thienylene vinylene). Electroabsorption spectra closely resemble the second energy derivative of the unperturbed π‐π* absorption and show oscillations associated with the strong vibronic features present therein. The dispersion of both the real and imaginary parts of χ(3) (−ω;0,0,ω) has been determined and we find that Re{χ(3)} has a peak value of 7.5×10−9 esu at 1.83 eV and Im{χ(3)} has a peak value of 6.2×10−9 esu at 1.78 eV. This nonlinearity is responsible for a photorefractive effect under resonant photoexcitation.This publication has 16 references indexed in Scilit:
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