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Proceedings Paper

Nonlinear Optics Of Molecular Aggregates
Author(s): Y Wang; M Bernstein; S H Stevenson
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Paper 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.

Paper Details

Date Published: 28 January 1987
PDF: 6 pages
Proc. SPIE 0682, Molecular and Polymeric Optoelectronic Materials, (28 January 1987); doi: 10.1117/12.939637
Show Author Affiliations
Y Wang, E.I.du Pont de Nemours and Company (United States)
M Bernstein, E. I. du Pont de Nemours and Company (United States)
S H Stevenson, E. I. du Pont de Nemours and Company (United States)

Published in SPIE Proceedings Vol. 0682:
Molecular and Polymeric Optoelectronic Materials
Garo Khanarian, Editor(s)

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