Large refractive nonlinearities and two-photon absorption in aryl-substituted dithiolenes

Stephen V. Kershaw; Stephen Nigel Oliver; Robert J. Manning; James D. Rush; Callum A. S. Hill; Allan E. Underhill; Adam Charlton

doi:10.1117/12.165276

16 December 1993 Large refractive nonlinearities and two-photon absorption in aryl-substituted dithiolenes

Stephen V. Kershaw, Stephen Nigel Oliver, Robert J. Manning, James D. Rush, Callum A. S. Hill, Allan E. Underhill, Adam Charlton

Author Affiliations +

Proceedings Volume 2025, Nonlinear Optical Properties of Organic Materials VI; (1993) https://doi.org/10.1117/12.165276
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

We have investigated some aryl substituted dithiolenes which show enhanced nonlinearity and their incorporation into polymer films. These neutral molecules show strong near infra-red absorption whose position is determined primarily by the extent of electron delocalization and the metal atom to which the sulphur ligands are attached. The presence of electron donating groups bathochromically shifts the band and selective detuning from the band is possible to arrive at optimum values for the important ration of nonlinear susceptibility to linear absorption, (chi) ⁽³)/(alpha) . Nonlinear optical characterization of these materials by degenerate four wave mixing and z-scan is described.

Citation Download Citation

Stephen V. Kershaw, Stephen Nigel Oliver, Robert J. Manning, James D. Rush, Callum A. S. Hill, Allan E. Underhill, and Adam Charlton "Large refractive nonlinearities and two-photon absorption in aryl-substituted dithiolenes", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); https://doi.org/10.1117/12.165276

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