Temperature dependence of the third-order nonlinear optical susceptibilities in polysilanes and polygermanes

Baumert, J.-C.; Bjorklund, G. C.; Jundt, D. H.; Jurich, M. C.; Looser, H.; Miller, R. D.; Rabolt, J.; Sooriyakumaran, R.; Swalen, J. D.; Twieg, R. J.
September 1988
Applied Physics Letters;9/26/1988, Vol. 53 Issue 13, p1147
Academic Journal
Optical third-harmonic generation was used to measure third-order nonlinear susceptibilities χ(3) for thin films of planar zigzag polysilanes and polygermanes. A χ(3) of 11.3×10-12 esu was measured, the largest value ever reported for a polymer with transparency throughout the visible. The value of χ(3) was found to vary substantially with thermally induced reversible changes in polymer backbone conformation and also with film thickness.


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