诺共振
光学
极化(电化学)
电介质
折射率
激发态
共振(粒子物理)
谐振器
激发
材料科学
物理
光电子学
等离子体子
原子物理学
化学
量子力学
物理化学
作者
Dandan Wang,Xinye Fan,Wenjing Fang,Huijuan Niu,Jifang Tao,Chuanchuan Li,Xin Wei,Qinghe Sun,Huawei Chen,Hening Zhao,Yingxin Yin,Wenjing Zhang,Chenglin Bai,Santosh Kumar
出处
期刊:Optics Express
[The Optical Society]
日期:2023-02-27
卷期号:31 (6): 10805-10805
被引量:14
摘要
In this paper, an all-dielectric metasurface consisting of a unit cell containing a nanocube array and organized periodically on a silicon dioxide substrate is designed and analyzed. By introducing asymmetric parameters that can excite the quasi-bound states in the continuum, three Fano resonances with high Q-factor and high modulation depth may be produced in the near-infrared range. Three Fano resonance peaks are excited by magnetic dipole and toroidal dipole, respectively, in conjunction with the distributive features of electromagnetism. The simulation results indicate that the discussed structure can be utilized as a refractive index sensor with a sensitivity of around 434 nm/RIU, a maximum Q factor of 3327, and a modulation depth equal to 100%. The proposed structure has been designed and experimentally investigated, and its maximum sensitivity is 227 nm/RIU. At the same time, the modulation depth of the resonance peak at λ = 1185.81 nm is nearly 100% when the polarization angle of the incident light is 0 °. Therefore, the suggested metasurface has applications in optical switches, nonlinear optics, and biological sensors.
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