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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
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Terahertz High-Sensitivity SPR Phase Biosensor Based on the Weyl Semimetals.
Yu Xie1,2, Zean Shen1, Mengjiao Ren1
1School of Physics and Electronics, Hunan Normal University, Changsha 410081, China.
Biosensors
|September 26, 2025
Summary
This study introduces a novel terahertz Surface Plasmon Resonance (SPR) biosensor using Weyl Semimetals (WSMs) for enhanced gas detection. The WSM-based SPR sensor achieves high phase detection sensitivity, improving upon traditional biosensor designs.
Area of Science:
- Optoelectronics
- Materials Science
- Biosensing
Background:
- Optical biosensors convert biological signals to optical signals for detection.
- Surface Plasmon Resonance (SPR) biosensors offer high sensitivity, making them a research focus.
- Weyl Semimetals (WSMs), 3D topological materials, possess unique electronic properties suitable for SPR sensing.
Purpose of the Study:
- To design and investigate a terahertz (THz) high-sensitivity SPR phase biosensor utilizing a KR structure based on WSMs.
- To evaluate the sensor's performance in gas sensing applications.
- To explore the influence of WSM properties on sensor sensitivity.
Main Methods:
- Design of a KR structure-based terahertz SPR biosensor incorporating WSMs.
- Application of the biosensor in gas sensing scenarios for performance evaluation.
- Analysis of the effects of Weyl node separation distance and twist angle on sensitivity.
- Optimization of sensor parameters using a deep learning algorithm (neural network).
Main Results:
- The WSM-based SPR biosensor achieved a phase detection sensitivity of 22,402°/RIU in gas sensing.
- Sensitivity was significantly improved compared to traditional SPR biosensors.
- Weyl node separation distance and twist angle were identified as key factors for sensitivity regulation.
- Deep learning optimization further enhanced sensor sensitivity and structural parameters.
Conclusions:
- The proposed WSM-based terahertz SPR biosensor demonstrates superior sensitivity for gas detection.
- WSM properties offer tunable parameters for optimizing SPR sensor performance.
- This work provides a feasible reference for advancing biological sensing technologies.
