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Proceedings Paper

Synthesis and characterization of metal-sulphur ligand complexes having high third-order optical nonlinearities
Author(s): Callum A. S. Hill; Allan E. Underhill; Adam Charlton; Christopher S. Winter; Stephen Nigel Oliver; James D. Rush
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Paper Abstract

Metal dithiolenes (Fig. 1) consist of conjugated organo sulphur ligands bound to a central metal atom and exhibit a range of interesting electrical and optical properties. Until recently this type of material was primarily of interest owing to the ability of some derivatives to act as u-electron donors in "organic metal" charge transfer salts1, though a resonant enhanced nonlinearity has been measured in the derivative BDN. 2 Electron delocalisation involving interaction through the metal leads to materials having low energy excited states. Strong absorption bands can occur throughout the visible and near infra-red regions depending on the exact nature of substitution. Tuning the absorption band near to the laser fundamental can result in the observation of a high nonlinear refractive index (n2 = 5 x 1011cm2/kW) coupled with low loss (cx = O.l6cm') in dilute solutions of selected derivatives.

Paper Details

Date Published: 25 February 1993
PDF: 11 pages
Proc. SPIE 1775, Nonlinear Optical Properties of Organic Materials V, (25 February 1993); doi: 10.1117/12.139225
Show Author Affiliations
Callum A. S. Hill, Univ. College of North Wales (United Kingdom)
Allan E. Underhill, Univ. College of North Wales (United Kingdom)
Adam Charlton, Univ. College of North Wales (United Kingdom)
Christopher S. Winter, British Telecom Research Labs. (United Kingdom)
Stephen Nigel Oliver, British Telecom Research Labs. (United Kingdom)
James D. Rush, British Telecom Research Labs. (United Kingdom)


Published in SPIE Proceedings Vol. 1775:
Nonlinear Optical Properties of Organic Materials V
David J. Williams, Editor(s)

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