二次谐波产生
拓扑(电路)
相(物质)
非线性光学
高次谐波产生
光学
光子学
谐波
物理
联轴节(管道)
材料科学
量子力学
数学
激光器
组合数学
冶金
作者
Weipeng Hu,Chao Liu,Xiaoyu Dai,Shuangchun Wen,Yuanjiang Xiang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-04-24
卷期号:48 (9): 2341-2341
被引量:1
摘要
Second harmonic generation (SHG) in topological photonic crystals is chiefly concerned with frequency conversion between the same topological states. However, little attention has been paid to the effect of coupling between different topological states on the SHG. In this study, we propose a method for achieving optimal SHG in a topological cavity by matching the phase distributions of the electric fields of the topological corner state (TCS) and topological edge state (TES). Our results show that the intrinsic efficiency can be improved when the phase distributions of the fundamental wave within the TCS and the second harmonic wave within the TES have the same symmetry. Otherwise, conversion efficiency will be greatly inhibited. With this method, we achieved an optimal intrinsic efficiency of 0.165%. Such a platform may enable the development of integrated nanoscale light sources and on-chip frequency converters.
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