Sensitivity-Tunable Terahertz Liquid/Gas Biosensor Based on Surface Plasmon Resonance with Dirac Semimetal.

Mengjiao Ren, Chengpeng Ji, Xueyan Tang, Haishan Tian, Leyong Jiang, Xiaoyu Dai, Xinghua Wu, Yuanjiang Xiang

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Article in Sensors (Basel, Switzerland), 2023. 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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1 citing paper in PubMed.

Versatile Tunable Terahertz Absorption Device Based on Bulk Dirac Semimetals and Graphene.Molecules (Basel, Switzerland) · 2025
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8 authors.

Mengjiao RenSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, China.

Chengpeng JiSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, China.

Xueyan TangSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, China.

Haishan TianSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, China.

Leyong JiangSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, China.

Xiaoyu DaiSchool of Physics and Electronics, Hunan University, Changsha 410082, China.

Xinghua WuKey Laboratory for Microstructural Functional Materials of Jiangxi Province, College of Science, Jiujiang University, Jiujiang 332005, China.

Yuanjiang XiangSchool of Physics and Electronics, Hunan University, Changsha 410082, China.

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this paper, we study the sensitivity-tunable terahertz (THz) liquid/gas biosensor in a coupling prism-three-dimensional Dirac semimetal (3D DSM) multilayer structure. The high sensitivity of the biosensor originates from the sharp reflected peak caused by surface plasmon resonance (SPR) mode. This structure achieves the tunability of sensitivity due to the fact that the reflectance could be modulated by the Fermi energy of 3D DSM. Besides, it is found that the sensitivity curve depends heavily on the structural parameters of 3D DSM. After parameter optimization, we obtained sensitivity over 100°/RIU for liquid biosensor. We believe this simple structure provides a reference idea for realizing high sensitivity and a tunable biosensor device.

Indexed as

Biosensing TechniquesSurface Plasmon ResonancebiosensorDirac semimetalsurface plasmon resonance

Identifiers

PMID37420684

DOI10.3390/s23125520

PMCPMC10302847

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