实现(概率)
光学
高次谐波产生
物理
波长
能量转换效率
非线性系统
偶然的
光电子学
二次谐波产生
第三代
束缚态
材料科学
原子物理学
量子力学
工程类
电信
声学
数学
激光器
统计
作者
Wenjie Tang,Qi Zhao,Ziyu Wang,Yunzhi Gao,Jun He,Yan Zhu,Shuxian Wang,Haohai Yu,Ruwen Peng,Mu Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-02-21
卷期号:49 (5): 1169-1169
摘要
The bound states in the continuum (BICs) have attracted much attention in designing metasurface due to their high Q-factor and effectiveness in suppressing radiational loss. Here we report on the realization of the third harmonic generation (THG) at a near-ultraviolet wavelength (343 nm) via accidental BICs in a metasurface. The absolute conversion efficiency of the THG reaches 1.13 × 10-5 at a lower peak pump intensity of 0.7 GW/cm2. This approach allows the generation of an unprecedentedly high nonlinear conversion efficiency with simple structures.
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