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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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025022728 |
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| author | Esakkiammal G․ Manikandan E․ |
| author_facet | Esakkiammal G․ Manikandan E․ |
| author_sort | Esakkiammal G․ |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-feef4957080a43868f96696e491cbb9e |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-feef4957080a43868f96696e491cbb9e2025-08-20T03:50:50ZengElsevierResults in Engineering2590-12302025-09-012710620010.1016/j.rineng.2025.106200Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applicationsEsakkiammal G․0Manikandan E․1School of Electronics Engineering, Vellore Institute of Technology, Chennai 600127, IndiaCentre for Advanced Materials and Innovative Technologies, Vellore Institute of Technology, Chennai 600127, India; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S2590123025022728MetasurfacesTHzFano resonanceHigh Q-factorRefractive Index(RI)Microplastic sensor |
| spellingShingle | Esakkiammal G․ Manikandan E․ Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications Results in Engineering Metasurfaces THz Fano resonance High Q-factor Refractive Index(RI) Microplastic sensor |
| title | Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications |
| title_full | Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications |
| title_fullStr | Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications |
| title_full_unstemmed | Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications |
| title_short | Excitation of high Q-factor Fano resonance in asymmetric THz metamaterial for microplastics sensing applications |
| title_sort | excitation of high q factor fano resonance in asymmetric thz metamaterial for microplastics sensing applications |
| topic | Metasurfaces THz Fano resonance High Q-factor Refractive Index(RI) Microplastic sensor |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025022728 |
| work_keys_str_mv | AT esakkiammalg excitationofhighqfactorfanoresonanceinasymmetricthzmetamaterialformicroplasticssensingapplications AT manikandane excitationofhighqfactorfanoresonanceinasymmetricthzmetamaterialformicroplasticssensingapplications |