Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator
Sensors with single resonant mode often produce false positive when detecting the composite vibrational fingerprints of molecules in the terahertz (THz) range. In this study, a multi-resonant plasmonic structure, consisting of periodic graphene split ring resonator (SRR) arrays, is proposed for THz...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9170772/ |
| _version_ | 1818329625022955520 |
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| author | Xinrong Mao Yanfen Hang Yuanguo Zhou Jinfeng Zhu Qiang Ren Jianming Zhuo Yijun Cai |
| author_facet | Xinrong Mao Yanfen Hang Yuanguo Zhou Jinfeng Zhu Qiang Ren Jianming Zhuo Yijun Cai |
| author_sort | Xinrong Mao |
| collection | DOAJ |
| description | Sensors with single resonant mode often produce false positive when detecting the composite vibrational fingerprints of molecules in the terahertz (THz) range. In this study, a multi-resonant plasmonic structure, consisting of periodic graphene split ring resonator (SRR) arrays, is proposed for THz sensing. The effective detection of ultrathin (0.1 μm) lactose layer is given as an example to demonstrate the detection sensitivity. The vibrational fingerprints of lactose at 0.53 THz and 1.37 THz are enhanced in transmission spectra. Besides, resonant frequencies could be actively adjusted with the gate voltage applied on the SRR array. The physical mechanism of multi-resonance can be explained by a combination of LC resonance and dipole resonance of the structure, which can be observed in the electric field distributions. Moreover, the sensing performance can be further optimized by varying geometric parameters. Furthermore, the refractive index sensing performance of the sensor is also investigated by altering the surrounding medium on the surface. The designed sensor can work under an oblique incidence, which provides potential applications in biological analysis and medical diagnostics. |
| first_indexed | 2024-12-13T12:51:02Z |
| format | Article |
| id | doaj.art-f67fa1df6860485485934beebbb4f1f6 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-13T12:51:02Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-f67fa1df6860485485934beebbb4f1f62022-12-21T23:45:20ZengIEEEIEEE Photonics Journal1943-06552020-01-011251810.1109/JPHOT.2020.30173759170772Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring ResonatorXinrong Mao0Yanfen Hang1Yuanguo Zhou2https://orcid.org/0000-0001-6373-3883Jinfeng Zhu3https://orcid.org/0000-0003-3666-6763Qiang Ren4https://orcid.org/0000-0002-2581-7709Jianming Zhuo5Yijun Cai6https://orcid.org/0000-0002-7520-9277College of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an, ChinaCollege of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an, ChinaCollege of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an, ChinaDepartment of Electronic Science, Xiamen University, Xiamen, ChinaSchool of Electronics and Information Engineering, Beihang University, Beijing, ChinaXiamen Blue Ocean Technology Company Limited, Xiamen, ChinaFujian Provincial Key Laboratory of Optoelectronic Technology and Devices, Xiamen University of Technology, Xiamen, ChinaSensors with single resonant mode often produce false positive when detecting the composite vibrational fingerprints of molecules in the terahertz (THz) range. In this study, a multi-resonant plasmonic structure, consisting of periodic graphene split ring resonator (SRR) arrays, is proposed for THz sensing. The effective detection of ultrathin (0.1 μm) lactose layer is given as an example to demonstrate the detection sensitivity. The vibrational fingerprints of lactose at 0.53 THz and 1.37 THz are enhanced in transmission spectra. Besides, resonant frequencies could be actively adjusted with the gate voltage applied on the SRR array. The physical mechanism of multi-resonance can be explained by a combination of LC resonance and dipole resonance of the structure, which can be observed in the electric field distributions. Moreover, the sensing performance can be further optimized by varying geometric parameters. Furthermore, the refractive index sensing performance of the sensor is also investigated by altering the surrounding medium on the surface. The designed sensor can work under an oblique incidence, which provides potential applications in biological analysis and medical diagnostics.https://ieeexplore.ieee.org/document/9170772/Terahertz sensingsplit ring resonatorgraphenesurface plasmons |
| spellingShingle | Xinrong Mao Yanfen Hang Yuanguo Zhou Jinfeng Zhu Qiang Ren Jianming Zhuo Yijun Cai Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator IEEE Photonics Journal Terahertz sensing split ring resonator graphene surface plasmons |
| title | Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator |
| title_full | Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator |
| title_fullStr | Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator |
| title_full_unstemmed | Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator |
| title_short | Probing Composite Vibrational Fingerprints in the Terahertz Range With Graphene Split Ring Resonator |
| title_sort | probing composite vibrational fingerprints in the terahertz range with graphene split ring resonator |
| topic | Terahertz sensing split ring resonator graphene surface plasmons |
| url | https://ieeexplore.ieee.org/document/9170772/ |
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