Hao-Jung Chang, S. Faryadras, S. Benis, S. David, O. Maury, G. Berginc, Andraud Chantal, D. Hagan, E. V. Van Stryland
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Abstract
We studied the effects of bromine substitution on the nonlinear absorption properties of aza-dipyrromethene dyes. Nonlinear absorption is measured at wavelengths of 1200, 1500, and 1700nm At 1200nm, excited-state absorption due to two-photon excitation appears, and it is more pronounced in the brominated polymethine cyanine.
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