Enhanced nonlinear optical response of composite materials.
Enhanced nonlinear optical response of composite materials.
复制标题
DOI：
10.1103/physrevlett.74.1871
复制
发表时间：
1995-03
影响因子：
8.6
通讯作者：
Fischer;Boyd;Gehr;Jenekhe;Osaheni;Sipe;Weller-Brophy
中科院分区：
文献类型：
--
作者：
Fischer;Boyd;Gehr;Jenekhe;Osaheni;Sipe;Weller-Brophy
我们目前的实验结果表明，有效的三阶极化率的复合光学材料可以超过那些从它的构造材料。特别是，我们已经形成了一个复合材料的交替，亚波长厚层的二氧化钛和共轭聚合物聚（$p$-亚苯基-苯并双噻唑），并发现其非线性的敏感性超过其更非线性成分的35%。在更理想但仍然现实的条件下，非线性极化率的增强可以大到10倍，可以理解为局部场校正的结果。
We present experimental results which demonstrate that the effective third-order susceptibility of a composite optical material can exceed those of the materials from which it is constructed. In particular, we have formed a composite of alternating, sub-wavelength-thick layers of titanium dioxide and the conjugated polymer poly( $p$-phenylene-benzobisthiazole), and find that its nonlinear susceptibility exceeds that of its more nonlinear constituent by 35%. The enhancement of the nonlinear susceptibility, which under more ideal but still realistic conditions can be as large as a factor of 10, can be understood as a consequence of local field corrections.