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首页> 外文会议>Conference on Linear and Nonlinear Optics of Organic Materials III; Aug 4-6, 2003; San Diego, California, USA >Femtosecond Two Photon Absorptivities of a Thiacyanine dye for Optical Limiting Applications
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Femtosecond Two Photon Absorptivities of a Thiacyanine dye for Optical Limiting Applications

机译：光学限制应用中硫氰酸菁染料的飞秒两个光子吸收率

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摘要

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, n_2 is large and relatively insensitive to the index of the solvent.
机译：已通过飞秒z扫描技术在一定范围的溶剂中测量了3,3'-二甲硫基-氰化碘化物（DETCI）的强度依赖性折射率和分子双光子吸收率（TPA）。在DETCI非常易溶的DMSO中，双光子吸收率和非线性折射率都是浓度的线性函数。相反，MeOH中DETCI的两个光子吸收率和非线性指数变化要低一个数量级，并且在远低于饱和极限的浓度下会显示饱和迹象。在高指数溶剂（如MeOH）中，DETCI的TPA在低指数溶剂（如DMSO）中要小得多。强度相关的折射率变化n_2很大，并且对溶剂的折射率相对不敏感。

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