Jieping Yang, Minchang Wang, Hu De, Ying Kang, Zongren Li, Quancheng Liu, Liang Xiong, Zhixiang Wu, Weiwei Qu, Liping Shang. Dual-Band Terahertz Sensor Based on Metamaterial Absorber Integrated Microfluidic[J]. Acta Optica Sinica, 2021, 41(23): 2328001
- Acta Optica Sinica
- Vol. 41, Issue 23, 2328001 (2021)
Fig. 1. Schematic diagram of the unit structure of dual-band terahertz sensor. (a) Side view of unit structure; (b) metal microstructure unit of sensor A; (c) metal microstructure unit of sensor B
Fig. 2. Reflection and absorption spectra of the sensors when there is no analyte in the microfluidic channel. (a) Sensor A; (b) sensor B
Fig. 3. Electric field and surface current distribution of the sensors at the resonance frequency. (a),(c) Mode A of sensor A; (b),(d) Mode B of sensor A; (e),(g) Mode A of sensor B; (f),(h) Mode B of sensor B
Fig. 4. Refractive index detection characteristics of the sensors. (a) Sensor A; (b) sensor B
Fig. 5. Electric field distribution in the x-z plane of the sensors at the resonant frequency. (a) Mode A of sensor A; (b) Mode B of sensor A; (c) Mode A of sensor B; (d) Mode B of sensor B
Fig. 6. Absorption spectra of the sensors under TE and TM polarized electromagnetic waves. (a) Sensor A; (b) sensor B
Fig. 7. Absorption and frequency shift change of the sensors with incident angle. (a)--(b) Sensor A; (c)--(d) sensor B
Fig. 8. Absorption change of the sensors with the polarization angle. (a) Sensor A; (b) sensor B
Fig. 9. Influence of manufacturing tolerances on sensing performance of the sensors. (a)--(b) Sensor A; (c)--(d) sensor B
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Table 1. [in Chinese]
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Table 2. Performance of different sensors
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