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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 the molecular two-photon absorptivity (TPA) of 3,3'-dielthylthia-cyanine iodide (DETCI) has been measured 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-linear 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 change, n2 is large and relatively insensitive to the index of the solvent.

Paper Details

Date Published: 14 July 2003
PDF: 8 pages
Proc. SPIE 4991, Organic Photonic Materials and Devices V, (14 July 2003); doi: 10.1117/12.479008
Show Author Affiliations
LaQuieta Huey, Norfolk State Univ. (United States)
Carl E. Bonner Jr., Norfolk State Univ. (United States)

Published in SPIE Proceedings Vol. 4991:
Organic Photonic Materials and Devices V
James G. Grote; Toshikuni Kaino, Editor(s)

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