Abstract

Specific features of optical second harmonic (SH) generation in arrays of chiral helical nanoholes in a silver film are studied experimentally. An increase in the intensity of the second-order nonlinear optical response is observed in the region of anomalous resonant transmission. The significant role of the rotational symmetry of the array of nanoholes in the formation of the SH response is revealed, which determines the azimuthal dependence of both the intensity of the second-order optical signal and the SH circular dichroism.

中文翻译：

---

银膜中纳米孔阵列中的第二次谐波产生

摘要

实验研究了银膜中手性螺旋纳米孔阵列中光学二次谐波（SH）生成的特定特征。在异常共振传输的区域中观察到二阶非线性光学响应强度的增加。揭示了纳米孔阵列的旋转对称性在SH响应的形成中的重要作用，这决定了二阶光信号强度和SH圆二色性的方位角依赖性。