Chengcheng Huang, Yonggang Zhang, Lanjü Liang, Haiyun Yao, Wenjia Liu, Fu Qiu. Ultrasensitive Terahertz Biosensor Based on Graphene Regulation Near Its Dirac Point and Electromagnetically Induced Transparency[J]. Laser & Optoelectronics Progress, 2023, 60(15): 1517001
- Laser & Optoelectronics Progress
- Vol. 60, Issue 15, 1517001 (2023)
Fig. 1. Preparation and characterization of GM. (a) Preparation process of GM; (b) 3D schematic of GM structure; (c) structural parameters of GM; (d) micrograph of GM; (e) Raman spectrum of three-layer graphene
Fig. 2. Transmission spectra. (a) Simulated transmission spectra of strip, semicircle, and entire structure; (b) transmission spectrum of experiment
Fig. 3. Electric field distribution in the XOY plane. (a) Strip; (b) semicircle; (c) entire structure
Fig. 4. Transmission spectrum of GM at different silk protein concentrations
Fig. 5. Schematic diagram of the Fermi energy level change of graphene at different silk protein concentrations
Fig. 6. Resonance parameters at different silk protein concentrations
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Table 1. Comparison of different terahertz biosensors
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