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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
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Sensitivity-Tunable Terahertz Liquid/Gas Biosensor Based on Surface Plasmon Resonance with Dirac Semimetal
Mengjiao Ren1, Chengpeng Ji1, Xueyan Tang1
1School of Physics and Electronics, Hunan Normal University, Changsha 410081, China.
Sensors (Basel, Switzerland)
|July 8, 2023
Summary
This study presents a tunable terahertz biosensor using a novel multilayer structure. Optimized designs achieve high sensitivity over 100°/RIU for liquid biosensing applications.
Area of Science:
- Optoelectronics
- Materials Science
- Biosensing Technology
Background:
- Surface Plasmon Resonance (SPR) is crucial for biosensor sensitivity.
- Terahertz (THz) biosensors offer unique detection capabilities.
- Three-dimensional Dirac semimetals (3D DSM) exhibit tunable electronic properties.
Purpose of the Study:
- To investigate a sensitivity-tunable THz liquid/gas biosensor.
- To explore the use of a coupling prism-3D DSM multilayer structure.
- To achieve high sensitivity and tunability in biosensing.
Main Methods:
- Utilized a coupling prism-3D DSM multilayer structure.
- Analyzed surface plasmon resonance (SPR) mode for sensitivity.
- Investigated the impact of 3D DSM Fermi energy on reflectance.
- Optimized structural parameters of the 3D DSM.
Main Results:
- Achieved high biosensor sensitivity due to sharp SPR peaks.
- Demonstrated tunability of sensitivity by modulating Fermi energy.
- Identified strong dependence of sensitivity on structural parameters.
- Obtained sensitivity exceeding 100°/RIU for liquid biosensors.
Conclusions:
- The proposed structure offers a simple yet effective design for tunable biosensors.
- This work provides a reference for developing high-sensitivity THz biosensing devices.
- The tunability of sensitivity is a key feature for versatile biosensing.
