Optical limiting response by embedding copper phthalocyanine into polymer host
Optical limiting response by embedding copper phthalocyanine into polymer host
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DOI：
10.1016/j.optcom.2009.03.008
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发表时间：
2009-06
影响因子：
2.4
通讯作者：
U. Kürüm;Tanju Ceyhan;A. Elmali;O. Bekaroglu
中科院分区：
文献类型：
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作者：
U. Kürüm;Tanju Ceyhan;A. Elmali;O. Bekaroglu
采用旋涂法在石英基底上制备了含有单核八(巯基丙基异丁基-POSS)取代酞菁铜(CuPc)的PMMA多层膜。使用开孔 Z 扫描技术描述了 CuPc 的非线性吸收和光限幅 (OL) 性能。测量是使用波长为 532 nm 的倍频 Nd:YAG 激光器产生的准直 4 ns 脉冲进行的。结果表明，与溶液中相同的 CuPc 分子相比，CuPc/PMMA 复合材料表现出更大的非线性吸收系数、更低的饱和注量和更低的光限幅吸收截面比。在不同激光强度下进行多次扫描后，没有在 CuPc/PMMA 薄膜中观察到薄膜疲劳或退化的迹象。这种材料是光学限幅应用的良好候选材料。
The multilayer film of PMMA containing mononuclear octakis(mercaptopropylisobutyl-POSS) substituted phthalocyaninato-copper (CuPc) was obtained by spin-coating on quartz substrate. The nonlinear absorption and optical limiting (OL) performance of CuPc have been described using the open-aperture Z-scan technique. The measurements were performed using collimated 4ns pulses generated from a frequency-doubled Nd:YAG laser at 532nm wavelength. The results indicate that CuPc/PMMA composite exhibits a much larger nonlinear absorption coefficient, a lower saturable fluence and a lower absorption cross-section ratio for optical limiting when compared to the same CuPc molecules in solution. No evidence of film fatigue or degradation was observed in the CuPc/PMMA film after numerous scans at varying laser intensity. This material is a good candidate for optical limiting applications.