Second-harmonic generation in gold crescent- and comma-like nanostructures.
Second-harmonic generation in gold crescent- and comma-like nanostructures.
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金新月形和逗号状纳米结构中的二次谐波产生。
DOI：
10.1364/ol.44.005473
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发表时间：
2019
期刊：
影响因子：
3.6
通讯作者：
T. Murzina
中科院分区：
文献类型：
--
作者：
I. Kolmychek;E. Mamonov;V. Bochenkov;T. Murzina
各向异性金属纳米结构显示出独特的光学性质，提供新的光学效应。在这里，我们实验研究的非线性光学响应的平面阵列的金逗号状和新月状纳米结构的胶体光刻。我们发现，各向异性的非线性光学响应的定义不仅由颗粒的形状，但也由相对相位的二阶极化率分量，这被发现是光谱敏感。在逗号状纳米结构中观察到高达70%的二次谐波产生响应的高值圆二色性。
Anisotropic metal nanostructures reveal unique optical properties providing new optical effects. Here we study experimentally the nonlinear-optical response of planar arrays of gold comma-like and crescent-like nanostructures made by colloidal lithography. We show that anisotropy of the nonlinear-optical response is defined not only by the shape of the particles, but also by the relative phase of second-order susceptibility components, which are found to be spectrally sensitive. High values of circular dichroism in the second-harmonic generation response up to 70% are observed in comma-like nanostructures.