当前位置: X-MOL 学术Phys. Chem. Chem. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
An all-dielectric metasurface based on Fano resonance with tunable dual-peak insensitive polarization for high-performance refractive index sensing
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2023-10-11 , DOI: 10.1039/d3cp03339b
Zeqian Liu 1 , Jiansen Du 2 , Zongtao Chi 1 , Hailin Cong 3 , Bin Wang 1
Affiliation  

A symmetric all-dielectric metasurface based on silicon and GaAs is proposed and numerically studied. In the mid-infrared region, two Fano resonant peaks with a reflectance exceeding 90% are observed. By altering the geometric parameters of the metasurface, the wavelength location and quality factor (Q-factor) of the resonant peaks can be tuned. The highest Q-factors can be 9609.67 and 3476.33, respectively. The proposed metasurface structure for optical refractive index sensing shows high performance and is insensitive to the plane wave's polarization state. In the refractive index range of 1.00 to 1.10, the highest sensitivity and figure of merit (FoM) are 1901.34 nm RIU−1 and 2492.04 RIU−1, respectively. The highest sensitivity is 2248.57 nm RIU−1 and FoM is 977.64 RIU−1 in the refractive index range of 1.30 to 1.40. These research results will help improve and innovate related sensing technologies and devices.

中文翻译:

基于法诺共振的全电介质超表面,具有可调谐双峰不敏感偏振,用于高性能折射率传感

提出并数值研究了一种基于硅和砷化镓的对称全电介质超表面。在中红外区域,观察到两个反射率超过90%的Fano共振峰。通过改变超表面的几何参数,可以调整谐振峰的波长位置和品质因数( Q因数)。最高Q因子可分别为 9609.67 和 3476.33。所提出的用于光学折射率传感的超表面结构表现出高性能并且对平面波的偏振态不敏感。在1.00至1.10的折射率范围内,最高灵敏度和品质因数(FoM)分别为1901.34 nm RIU -1和2492.04 RIU -1。在1.30至1.40的折射率范围内,最高灵敏度为2248.57 nm RIU -1,FoM为977.64 RIU -1 。这些研究成果将有助于改进和创新相关传感技术和器件。
更新日期:2023-10-12
down
wechat
bug