Ecole Normale Supérieure de Lyon, CNRS-UMR 5182, Université de Lyon 1, 46 Allée d'Italie, F-69364 Lyon cedex 07, France.
Phys Chem Chem Phys. 2012 Nov 28;14(44):15299-307. doi: 10.1039/c2cp40779e. Epub 2012 Oct 10.
Spectroscopic properties, two-photon absorption (TPA) and excited state absorption (ESA), of two organic cyanine dyes and of a ruthenium based organometallic cyanine are compared in order to rationalize their similar ns-optical power limiting (OPL) efficiency in the telecommunication wavelength range. The TPA contribution to the ns-OPL behavior is higher for both organic cyanines, while the main process is a TPA-induced ESA in the case of the organometallic system, in which the ruthenium induces a broadening of the NIR-ESA band and resulting in a strong spectral overlap between TPA and ESA spectra.
为了合理解释两种有机花菁染料和一种基于钌的有机金属花菁染料在电信波长范围内具有相似的纳秒光学限幅（ns-OPL）效率，比较了它们的光谱性质、双光子吸收（TPA）和激发态吸收（ESA）。对于这两种有机花菁染料，TPA 对 ns-OPL 行为的贡献更高，而对于有机金属体系，主要过程是 TPA 诱导的 ESA，其中钌诱导了 NIR-ESA 带的展宽，导致 TPA 和 ESA 光谱之间产生强烈的光谱重叠。
