Nonlinear Optics Of Molecular Aggregates

Y Wang; M Bernstein; S H Stevenson

doi:10.1117/12.939637

28 January 1987 Nonlinear Optics Of Molecular Aggregates

Y Wang, M Bernstein, S H Stevenson

Proceedings Volume 0682, Molecular and Polymeric Optoelectronic Materials; (1987) https://doi.org/10.1117/12.939637
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

We report a new class of molecules, pyrylium dye aggregates, that possess exceptionally large second-order optical nonlinearity. These dye molecules aggregate spontaneously in a polymer matrix to form a head-to-tail ordered structure. We have observed efficient second harmonic generation in a micron-size thin film containing only 1.5 wt% dye aggregate. This observation suggests the exciting possibility of achieving significant nonlinear optical interaction within one coherence length. Semi-empirical molecular orbital calculations also suggest that these dyes possess large second-order polarizabilities. We suggest that charge-transfer excitons within the aggregates may account for the large observed nonlinearities.

Citation Download Citation

Y Wang, M Bernstein, and S H Stevenson "Nonlinear Optics Of Molecular Aggregates", Proc. SPIE 0682, Molecular and Polymeric Optoelectronic Materials, (28 January 1987); https://doi.org/10.1117/12.939637

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