Terahertz Metamaterial Absorber and Equivalent Circuit Model for Refractive Index Sensing.

Zhengxiong Lu, Peixuan Li, Chuanwei Zhang, Shuaitian Li, Ruibo Chen, Ziliang Zhou, Xiaojun Huang

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Article in Materials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 citing paper in PubMed.

A triple-band terahertz metamaterial perfect absorber for biomedical applications and biomarker detection.PloS one · 2026
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7 authors.

Zhengxiong LuSchool of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Peixuan LiSchool of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Chuanwei ZhangSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Shuaitian LiSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Ruibo ChenCollege of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Ziliang ZhouCollege of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Xiaojun HuangCollege of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.ORCID 0000-0002-7685-2678

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

As a kind of important functional device, terahertz metamaterial absorbers (TMA) have been focused on by many researchers for their capacity to absorb electromagnetic waves and wide application fields. In this work, we designed a terahertz metamaterial absorber with narrow-band absorption for refractive index sensing, which consisted of a circular metal ring resonator and a square metal ring resonator. The simulation results show that the absorptivity of the proposed TMA reached over 68.8% and 93.27% at 1.926 and 4.413 THz, respectively. Moreover, the absorption mechanism was studied through the electromagnetic field energy distribution, and the influence of structural parameters on absorption performance was exhibited. In refractive index sensing, a high sensitivity (S) of 2.537 THz/RIU (refractive index unit, RIU) was achieved by utilizing the coupling of ring resonators. The maximal quality factor (Q-factor) and figure of merit (FOM) of the TMA were 234.73 and 147.67 RIU

Indexed as

equivalent circuitmetamaterial absorberrefracting index sensingterahertz

Identifiers

PMID40004289

DOI10.3390/ma18040765

PMCPMC11857535

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.