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Proceedings Paper

Resonant third-order optical nonlinearity of the neutral and the dication molecules of a triphenodithiazine model compound
Author(s): Jacek Swiatkiewicz; Maciek E. Orczyk; Paras N. Prasad; Charles W. Spangler; Mingqian He
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Paper Abstract

Third order nonlinear optical susceptibility of solutions of a triphenodithiazine derivative in dichloromethane has been measured at several different wavelengths utilizing sub-picosecond degenerate four-wave mixing. The values of the second hyperpolarizability, (gamma) , for the neutral and for the oxidized form (dication) are reported. The measurements performed at the wavelengths corresponding to the absorption maxima of the neutral and the dication forms (578 nm and 800 nm, respectively) indicate a twofold increase of the (gamma) /(sigma) figure of merit (where (sigma) is the absorption cross section) for the dication molecule. Time resolved experiments reveal different dynamics of photoexcitation relaxation in the neutral and the oxidized molecules.

Paper Details

Date Published: 16 December 1993
PDF: 8 pages
Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); doi: 10.1117/12.165277
Show Author Affiliations
Jacek Swiatkiewicz, SUNY/Buffalo (United States)
Maciek E. Orczyk, SUNY/Buffalo (United States)
Paras N. Prasad, SUNY/Buffalo (United States)
Charles W. Spangler, Northern Illinois Univ. (United States)
Mingqian He, Northern Illinois Univ. (United States)

Published in SPIE Proceedings Vol. 2025:
Nonlinear Optical Properties of Organic Materials VI
Gustaaf R. Moehlmann, Editor(s)

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