Organic semiconductor-doped polymer glasses as novel nonlinear media

Graham Hugh Cross; M. Carroll; Tony L. Axon; David Bloor; Raul Rangel-Rojo; Ajoy Kumar Kar; Brian S. Wherrett

doi:10.1117/12.139226

25 February 1993 Organic semiconductor-doped polymer glasses as novel nonlinear media

Graham Hugh Cross, M. Carroll, Tony L. Axon, David Bloor, Raul Rangel-Rojo, Ajoy Kumar Kar, Brian S. Wherrett

Proceedings Volume 1775, Nonlinear Optical Properties of Organic Materials V; (1993) https://doi.org/10.1117/12.139226
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Polymeric composites containing microcrystals of 1:1 salts of tetracyano-p-quinodimethane, TCNQ, have been prepared. Re-crystallization of these organic one-dimensional semiconductors in-situ by either heat treatment or exposure to vapor yields uniform dispersions of crystallites of sub-optical dimensions. We report a strong dependence of the lowest energy electronic absorption band in the lithium and potassium TCNQ salt with crystallite size. The inter-molecular charge transfer band shows a shift of up to 0.5 eV between films where the crystallite size is a few microns and those where crystals cannot be observed optically. The non-linear refraction of a heat treated film containing TEA^{(direct sum})(TCNQ) (TEA^{(direct sum}) - triethylammonium) is reported. (chi) ⁽³) at 712 nm is 2.69 X 10^-10 esu and is found to be a bleaching resonant non-linearity.

Citation Download Citation

Graham Hugh Cross, M. Carroll, Tony L. Axon, David Bloor, Raul Rangel-Rojo, Ajoy Kumar Kar, and Brian S. Wherrett "Organic semiconductor-doped polymer glasses as novel nonlinear media", Proc. SPIE 1775, Nonlinear Optical Properties of Organic Materials V, (25 February 1993); https://doi.org/10.1117/12.139226

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