MoS₂ surface plasmon resonance based high-resolution THz biosensor using a dual D-shaped channel micro-structured fiber

Xue, Jia1; Zhang, Yani1; Guang, Zhe2; Hu, Jie3; Zhao, Fang3; Liu, Yuhui3; Shao, Liyang3

2025

10.1016/j.optlastec.2024.111387

OPTICS AND LASER TECHNOLOGY   影响因子和分区

0030-3992

1879-2545

Currently, the field of THz bio-detection faces challenges in terms of sensitivity, efficiency and anti-interference, to which high-sensitivity, multi-channel optical fiber sensors offer a key solution. Here, a high-resolution THz biosensor based on surface plasmon resonance (SPR) is achieved by depositing a MoS2 2 excitation layer on a dual- channel micro-structured fiber (MSF). The dual D-shaped channels are completely separated by support-arm claddings to ensure the detection independence, and the dual-channel introduces self-referencing to reduce the measurement bias caused by environmental changes. Transmission performance of the SPR-MSF sensor is optimized by adjusting its structural design parameters based on a finite element method (FEM). The results show that the proposed SPR-MSF biosensor presents high amplitude sensitivity of up to 384.80 RIU-1 and high wavelength sensitivity of 223.45 mu m/RIU, corresponding to sensing resolution of 4.47 x 10(-7) RIU. Furthermore, the dual-channel wavelength sensitivity and sensing resolution can be improved to 602.52 mu m/RIU and 1.66 x 10(-7) RIU, respectively, with a ZnO thin film deposited in the detection channel. With its unique high sensitivity and high resolution, as well as other advantages provided by fiber-based such as the compactness and biocompatibility, the proposed SPR-MSF bio-sensor has potential applications in biochemical sensing, biomolecule identification, non-invasive cell analysis and many other THz detection fields.

Surface plasmon resonance Terahertz Micro-structured fiber biosensor MoS2 ZnO Sensitivity Resolution

SCI

英语

通讯

National Natural Science Foundation of China[61765004] ; Key Science and Technology Program of Shaanxi Province["2021KWZ-11","2021QFY03-02","2022QFY04-03"] ; Science and Technology Project of Xi'an City[22GXFW0009] ; Natural Science Basic Research Program of Shaanxi Province[2020JQ-735] ; Open Research Fund of State Key Laboratory of Transient Optics and Photonics[SKLST202219]

Optics ; Physics

Optics ; Physics, Applied

WOS:001275253000001

ELSEVIER SCI LTD

ENGINEERING

Web of Science

1.Shaanxi Univ Sci & Technol, Sch Phys & Informat Sci, Dept Phys, Xian 710021, Shaanxi, Peoples R China
2.Georgia Inst Technol, Sch Phys, 837 State St NW, Atlanta, GA 30332 USA
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Xue, Jia,Zhang, Yani,Guang, Zhe,et al. MoS₂ surface plasmon resonance based high-resolution THz biosensor using a dual D-shaped channel micro-structured fiber[J]. OPTICS AND LASER TECHNOLOGY,2025,180.

Xue, Jia.,Zhang, Yani.,Guang, Zhe.,Hu, Jie.,Zhao, Fang.,...&Shao, Liyang.(2025).MoS₂ surface plasmon resonance based high-resolution THz biosensor using a dual D-shaped channel micro-structured fiber.OPTICS AND LASER TECHNOLOGY,180.

Xue, Jia,et al."MoS₂ surface plasmon resonance based high-resolution THz biosensor using a dual D-shaped channel micro-structured fiber".OPTICS AND LASER TECHNOLOGY 180(2025).