Optothermal nonlinearity of silica aerogel
Optothermal nonlinearity of silica aerogel
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DOI：
10.1063/1.4959240
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发表时间：
2016-07-25
影响因子：
4
通讯作者：
Conti, Claudio
中科院分区：
文献类型：
--
作者：
Braidotti, Maria Chiara;Gentilini, Silvia;Conti, Claudio
我们报告了通过 z 扫描技术获得的二氧化硅气凝胶热光学非线性的表征。结果表明，典型的二氧化硅气凝胶具有与玻璃相似的非线性光学系数（相似或等于10 (-12) m(2) /W），光学非线性吸收可以忽略不计。通过在气凝胶中嵌入吸收染料，可以将非线性系数增加到10 (-10) m(2) /W 范围内的值。该值比在纯染料和典型的高度非线性材料（如液晶）中观察到的值高一个数量级。由 AIP 出版社出版。
We report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical silica aerogels have nonlinear optical coefficient similar to that of glass (similar or equal to 10 (-12) m(2) /W), with negligible optical nonlinear absorption. The nonlinear coefficient can be increased to values in the range of 10 (-10) m(2) /W by embedding an absorbing dye in the aerogel. This value is one order of magnitude higher than that observed in the pure dye and in typical highly nonlinear materials like liquid crystals. Published by AIP Publishing.