Nonlinear Optical Interactions In Langmuir-Blodgett Organic Semiconductor Heterostructures

P. N. Prasad; M. K. Casstevens; J. Pfleger; P. Logsdon

doi:10.1117/12.943963

3 May 1988 Nonlinear Optical Interactions In Langmuir-Blodgett Organic Semiconductor Heterostructures

P. N. Prasad, M. K. Casstevens, J. Pfleger, P. Logsdon

Proceedings Volume 0878, Multifunctional Materials; (1988) https://doi.org/10.1117/12.943963
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Monolayer and multilayer Langmuir-Blodgett films of two systems: (i) polyalkylthiophene and (ii) tetrakis cumylphenoxy phthalocyanines in pure form and mixed phase with octadecanol were prepared. We report here the first observation of a degenerate four wave mixing signal from a monolayer Langmuir-Blodgett film that of phthalocyanine, due to a large resonant third order optical nonlinearity, x(3) . The effective x(3) behaviors of both phthalocyanine and polythiophene Langmuir-Blodgett films were investigated by time-resolved femtosecond degenerate four wave mixing. The polythiophene Langmuir-Blodgett film when doped with iodine was found to be highly conductive. We have also observed a dramatic reduction of the nonlinear reflectivity as a consequence of iodine doping of polythiophene Langmuir-Blodgett films.

Citation Download Citation

P. N. Prasad, M. K. Casstevens, J. Pfleger, and P. Logsdon "Nonlinear Optical Interactions In Langmuir-Blodgett Organic Semiconductor Heterostructures", Proc. SPIE 0878, Multifunctional Materials, (3 May 1988); https://doi.org/10.1117/12.943963

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