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Proceedings Paper

Femtosecond two-photon absorptivities of a thiacyanine dye for optical limiting applications
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Paper Abstract

The intensity dependent index of refraction and themolecular two-photon absorptivity (TPA) of 3,3'-dielthylthia-cyanine iodide (DETCI) has been measued in a range of solvents by the femtosecond z-scan technique. In DMSO, where DETCI is quite soluble, both the two-photon absorptivity and the nonlinear index of refraction are linear functions of concentration. In contrast, the two photon absorptivity and non-olniear index change of DETCI in MeOH is an order of magnitude lower and shows signs of saturation at concentrations well below the saturation limit. In high index solvents such as MeOH, the TPA of DETCI is much smaller in lower index solvents such as DMSO. The intensity dependent index chagne, n2 is large and relatively insensitive to the index of the solvent.

Paper Details

Date Published: 10 November 2003
PDF: 6 pages
Proc. SPIE 5212, Linear and Nonlinear Optics of Organic Materials III, (10 November 2003); doi: 10.1117/12.506451
Show Author Affiliations
LaQuieta F. Huey, Norfolk State Univ. (United States)
Carl E. Bonner, Norfolk State Univ. (United States)


Published in SPIE Proceedings Vol. 5212:
Linear and Nonlinear Optics of Organic Materials III
Mark G. Kuzyk; Manfred Eich; Robert A. Norwood, Editor(s)

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