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首页> 外文期刊>Optical Materials >Nonlinear optical and optical limiting properties of polymeric carboxyl phthalocyanine coordinated with rare earth atom
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Nonlinear optical and optical limiting properties of polymeric carboxyl phthalocyanine coordinated with rare earth atom

机译：聚合物羧基酞菁与稀土原子配位的非线性光学和光学极限性质

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摘要

The nonlinear optical properties of the polymeric carboxyl phthalocyanine with lanthanum (LaPPc.-COOH), holmium (HoPPc.COOH) and ytterbium (YbPPc.COOH) as centric atom, were investigated by the Z-scan method using a picosecond 532 nm laser. The synthesized phthalocyanines had steric polymeric structure and dissolved well in aqueous solution. The nonlinear optical response of them was attributed to the reverse saturable absorption and self-focus refraction. The nonlinear absorption properties decreased with the centric atoms changing from La, Ho to Yb. The largest second-order hyperpolarizability and optical limiting response threshold of LaPPc.COOH were 3.89 x 10(-29) esu and 0.32 J/cm(2), respectively. The reverse saturable absorption was explained by a three level mode of singlet excited state under the picosecond irradiation. The result indicates the steric structure presented additive stability of these polymeric phthalocyanines for their application as potential optical limiting materials. (c) 2017 Elsevier B.V. All rights reserved.
机译：以皮秒532 nm激光通过Z扫描法研究了以镧（LaPPc.COOH），（HoPPc.COOH）和（YbPPc.COOH）为中心原子的聚合物羧基酞菁的非线性光学性质。合成的酞菁具有立体聚合结构，并且在水溶液中溶解良好。它们的非线性光学响应归因于反向饱和吸收和自聚焦折射。非线性吸收特性随中心原子从La，Ho到Yb的变化而降低。 LaPPc.COOH的最大二阶超极化率和光学极限响应阈值分别为3.89 x 10（-29）esu和0.32 J / cm（2）。反向饱和吸收是通过皮秒辐射下单重激发态的三能级模式来解释的。结果表明，空间结构为这些聚合物酞菁作为潜在的光学限制材料提供了附加的稳定性。 （c）2017 Elsevier B.V.保留所有权利。

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