Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications
The increasing demand for terahertz (THz) technology in various applications has resulted in the need for high-quality, highly sensitive THz sensors. This work analyses the refractive index sensing properties of a Fano resonance THz metasurface. The metasurface structure uses square-circle resonator...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025022728 |
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| Summary: | The increasing demand for terahertz (THz) technology in various applications has resulted in the need for high-quality, highly sensitive THz sensors. This work analyses the refractive index sensing properties of a Fano resonance THz metasurface. The metasurface structure uses square-circle resonators on a Polyimide substrate. The proposed structure has an improved quality factor(Q-factor) and better properties for sensing applications. The unit cell has an asymmetric structure that achieves the resonance at 0.69 THz and exhibits a Fano resonance at 0.72 THz with a Q-factor of 26.5 and 720 respectively. The Figure of Merit (FOM) at Fano resonance is higher than that of fundamental resonance. The proposed structure exhibits angle-independent characteristics up to 60°. The high-Q factor enhances the sensing capability of the metasurfaces, which is further analyzed for microplastic sensing applications. |
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| ISSN: | 2590-1230 |