Antenna-Based Approach to Fine Control of Supercavity Mode Quality Factor in Metasurfaces
NANO LETTERS(2023)
摘要
The utilization of photonic bound states in the continuum(BIC)is a very attractive approach for many applications requiring efficientresonators. High-Q modes related to symmetry-protected BIC are formeddue to perturbation defined by an asymmetry parameter, and the smallerthis parameter is, the bigger the Q factor can be achieved. Inevitablefabrication imperfectness limits precise control of the Q factor throughthe asymmetry parameter. Here we propose an antenna-based design ofmetasurfaces for accurate tailoring of the Q factor where strongerperturbation leads to the same effect in the conventional design.This approach allows the fabrication of samples with equipment havinglower tolerance keeping the Q factor at the same level. Furthermore,our findings reveal two regimes of the Q factor scaling law with saturatedand unsaturated resonances dependent on the ratio of antenna particlesto all particles. The boundary is defined by the efficient scatteringcross section of the metasurface constituent particles.
更多查看译文
关键词
Bound states in the continuum,optical antenna,silicon metasurface,high-Q resonators,nanoparticle,multipole decomposition
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要