Research Article
High-Sensitivity Multiband Detection Based on the Local Enhancement Effect of an Electric Field at Terahertz Frequency
Table 1
Comparison with previously reported literature.
| | Designed structure/material | RI sensor range | Resonance frequency | Sensitivity | -factor | Absorptivity |
| | Two identical circular ring resonators [20] | 1.34 to 1.39 | 2.64 THz | 1500 GHz/RIU | 44 | 99.5% | | Concentric hexagonal ring resonator [21] | 1.31 to 1.39 | 1.93 THz | 1045 GHz/RIU | 178.7 | 99.93% | | Microcylinder arrays [22] | 1.0 to 1.05 | 1.8985 THz | 960 GHz/RIU | 120.9 | 99.9% | | Asymmetric cross [23] | 1.0 to 1.1 | 1.23 THz
2.39 THz
3.19 THz | 200 GHz/RIU
300 GHz/RIU 1600 GHz/RIU | 7
14
29 | 99.07%
99.84%
99.01% | | Three concentric square ring metallic resonators [24] | 1.0 to 1.6 | 0.337 THz
0.496 THz
0.718 THz | 72 GHz/RIU
103.5 GHz/RIU
139.5 GHz/RIU | — | 99.5%
86.4%
98.4% | | Dirac semimetal [25] | 1.0 to 1.8 | 1.258 THz
1.85 THz
2.12 THz | 57.5 GHz/RIU
152.5 GHz/RIU
51.4 GHz/RIU | 46.6
52.86
106 | 95.5%
95.8%
98% | This work
Three asymmetric metallic strips | 1.0 to 2.0 | 0.871 THz
1.075 THz
1.397 THz | 208 GHz/RIU
150 GHz/RIU
131 GHz/RIU | 29
35
46 | 96%
99%
95% |
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