Terahertz refractive index sensor based on triple-band absorption metasurface

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-01-22 DOI:10.1016/j.optcom.2024.131449

Dongming Liu , Shujie Qiu , Yetong Wang , Jian Han , Qiang Liu , Tingting Lv

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引用次数: 0

Abstract

High-performance metasurface refractive index sensors are extremely promising for biosensing, petroleum, agricultural production, and security detection fields. We theoretically propose a terahertz refractive index sensor based on absorption mechanism, which can achieve an excellent triple-band absorber and high-performance refractive index sensor. The proposed triple-band absorber may achieve 90.22%, 98.87%, and 99.91% at 0.93, 1.12 and 1.45 THz, respectively. Multi-band response promises multi-point matching of the resonant frequency between the sensor and the measured substance, thus enabling a high-accuracy terahertz sensor. The refractive index sensor has the maximum sensitivity (S), quality factor (Q), and figure of merit (FOM) of 420 GHz/RIU, 71.54, and 21.4 RIU⁻¹, respectively. The triple-band absorber is achieved by the combination of electric and magnetic dipole responses and the sensing performance is determined by localized electromagnetic field distribution. The proposed terahertz refractive index metasurface sensor has a promising application prospect in biosensing and critical parameter measurement for oil and gas wells.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.