High-Performance Quality Factor Based Sensor With Diagonal Cylinder Metasurface of the Bound State in the Continuum
作者机构：School of ScienceJiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and TechnologyJiangnan UniversityWuxi 214122China State Key Laboratory of Millimeter WavesSoutheast UniversityNanjing 210096China
出 版 物：《Photonic Sensors》 (光子传感器（英文版）)
年 卷 期：2023年第13卷第2期
页 面：89-98页
核心收录：
学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程]
基 金：supported in part by the National Natural Science Foundation of China(Grant No.11811530052) Intergovernmental Scienceand Technology Regular Meeting Exchange Project of Ministry of Science and Technology of China(Grant No.CB02-20) Open Fund of State Key Laboratory of Applied Optics(Grant No.SKLA02020001A04) Undergraduate Research and Innovation Projects of China(Grant No.2021102Z)
主 题：Metasurfaces bound state in the continuum toroidal dipole
摘 要：High-quality-factor(high-Q-factor)electromagnetic resonance plays an important role in sensor *** proposed gas refractive index sensors are often limited by the large cavity length or microscale fabrication process in practical ***,ultra-high Q factor resonance based on the bound state in the continuum(BIC)has provided a feasible approach to solve these *** this paper,we propose a metasurface structure consisting of a single size tetramer *** supports dual band toroidal dipole(TD)resonances driven by *** physical mechanism of double TD resonances is clarified by the multipole decomposition of the metasurface band structure and far-field scattering *** sensor structure based on this achieves a sensitivity of 518.3 MHz/RIU,and the maximum line width does not exceed *** high-Q-factor electromagnetic resonance has the advantages of polarization independence and simplicity to *** findings will open up an avenue to develop the ultrasensitive sensor in the gigahertz regime.
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