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10 October 1997 Reverse saturable absorption in polymethine dyes
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Abstract
Thenonlinear absorption of a series of polymethine dyes (PD's) have been investigated, and some of them are identified as potential candidates for optical limiting applications. We have demonstrated that very low optical limiting thresholds can be obtained by using polymethine dyes with a large ratio of the absorption cross section ofthe excited to the ground-state: a ratio as large as 200 has been measured in one of the PD's. This value is significantly higher than any previously reported value, while, at the same time, maintaining a large ground-state cross section. It has been shown that nonlinear absorption of PD's in polyurethane acrylate (PUA) polymer is as large as in ethanol solution. In addition, photostability of the PD's and initial measurements ofoptical limiting in these samples are reported.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Salah Khodja, David J. Hagan, Jin Hong Lim, Olga V. Przhonska, Sidney S. Yang, J. Buckley, and Eric W. Van Stryland "Reverse saturable absorption in polymethine dyes", Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); https://doi.org/10.1117/12.284164
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