Angle-Insensitive Toroidal Metasurface for High-Efficiency Sensing

被引：19

作者：

Qin, Pengfei ^{[1
]}

Li, Erping ^{[1
]}

Li, Tianwu ^{[1
]}

Ma, Hanzhi ^{[1
]}

Yang, Yihao ^{[1
]}

Ang, Lay Kee ^{[2
]}

Chen, Hongsheng ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Informat Sci & Elect Engn, Key Lab Adv Micro Nano Elect Devices & Smart Syst, Hangzhou 310027, Peoples R China

[2] Singapore Univ Technol & Design, Sci & Math Pillar, Singapore 487372, Singapore

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2021年 / 69卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Angle insensitive; metasurfaces; planar filters; toroidal dipoles; tunable filters;

D O I：

10.1109/TMTT.2020.3027016

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article presents a novel toroidal metasurface that is able to support a toroidal response at almost all incident angles for a transverse magnetic (TM) wave at the microwave range. A flat band is observed from the calculated band structure where the radiation power of the toroidal response is highest around 7.51 GHz. A high transmission at a resonant frequency is observed from the simulated and measured transmission coefficients with different incident angles, whereas the transmission is lower at the rest frequency range. The resonance frequency at a high sensitivity of 0.78 GHz/refraction index unit (RIU) is experimentally demonstrated, which is very sensitive to the thickness and the refraction index of the surrounding materials such that the proposed toroidal metasurface could be used for a tunable highly efficient filters.

引用

页码：1511 / 1517

页数：7

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