华体会官方网页版-华体会(中国):High-Performance Refractive Index and Temperature Sensing Based on Toroidal Dipole in All-Dielectric Metasurface
Author(s): Zhao, JJ (Zhao, Jingjing); Fan, XY (Fan, Xinye); Fang, WJ (Fang, Wenjing); Xiao, WX (Xiao, Wenxing); Sun, FX (Sun, Fangxin); Li, CC (Li, Chuanchuan); Wei, X (Wei, Xin); Tao, JF (Tao, Jifang); Wang, YL (Wang, Yanling); Kumar, S (Kumar, Santosh)
Source: SENSORS? Volume: 24? Issue: 12? Article Number: 3943? DOI: 10.3390/s24123943? Published Date: 2024 JUN??
Abstract: This article shows an all-dielectric metasurface consisting of "H"-shaped silicon disks with tilted splitting gaps, which can detect the temperature and refractive index (RI). By introducing asymmetry parameters that excite the quasi-BIC, there are three distinct Fano resonances with nearly 100% modulation depth, and the maximal quality factor (Q-factor) is over 104. The predominant roles of different electromagnetic excitations in three distinct modes are demonstrated through near-field analysis and multipole decomposition. A numerical analysis of resonance response based on different refractive indices reveals a RI sensitivity of 262 nm/RIU and figure of merit (FOM) of 2183 RIU-1. This sensor can detect temperature fluctuations with a temperature sensitivity of 59.5 pm/k. The proposed metasurface provides a novel method to induce powerful TD resonances and offers possibilities for the design of high-performance sensors.
Accession Number: WOS:001255729800001
PubMed ID: 38931726
Author Identifiers:
Author Web of Science ResearcherID ORCID Number
Kumar, Santosh J-7408-2013 0000-0003-4149-0096?
eISSN: 1424-8220
