Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene
One of the most important applications of THz frequencies is biomedical sensing. However, in a THz range, surface plasmon waves on flat metals are not confined and therefore cannot be used for subwavelength sensing. But, it has been shown that graphene can support surface waves at THz frequencies, w...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8168356/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849421733671469056 |
|---|---|
| author | Yuanjiang Xiang Jiaqi Zhu Leiming Wu Qi You Banxian Ruan Xiaoyu Dai |
| author_facet | Yuanjiang Xiang Jiaqi Zhu Leiming Wu Qi You Banxian Ruan Xiaoyu Dai |
| author_sort | Yuanjiang Xiang |
| collection | DOAJ |
| description | One of the most important applications of THz frequencies is biomedical sensing. However, in a THz range, surface plasmon waves on flat metals are not confined and therefore cannot be used for subwavelength sensing. But, it has been shown that graphene can support surface waves at THz frequencies, which has similar properties as plasmonic waves in an optical range. In this paper, a highly sensitive gas sensor in the terahertz frequencies by exciting surface plasmon resonance (SPR) of graphene is proposed. The results show that the proposed SPR gas sensor has high stability and high sensitivity (<italic>S</italic>), and the highest <italic>S</italic><sub>max</sub> (∼147°/RIU) has been obtained by optimizing the Fermi energy, the thickness of the dielectric layer, and the incident light frequency. Moreover, the <italic>S</italic> of the proposed THz sensor for different refractive index (RI) of gas sensing medium (<italic>n</italic><sub>1</sub>) is also discussed. |
| format | Article |
| id | doaj-art-3d14a47cd99649969cf5e75ce4e98b89 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-3d14a47cd99649969cf5e75ce4e98b892025-08-20T03:31:23ZengIEEEIEEE Photonics Journal1943-06552018-01-011011710.1109/JPHOT.2017.27782458168356Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With GrapheneYuanjiang Xiang0https://orcid.org/0000-0002-7225-5411Jiaqi Zhu1Leiming Wu2https://orcid.org/0000-0002-2549-6458Qi You3Banxian Ruan4Xiaoyu Dai5https://orcid.org/0000-0002-0180-8357SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaOne of the most important applications of THz frequencies is biomedical sensing. However, in a THz range, surface plasmon waves on flat metals are not confined and therefore cannot be used for subwavelength sensing. But, it has been shown that graphene can support surface waves at THz frequencies, which has similar properties as plasmonic waves in an optical range. In this paper, a highly sensitive gas sensor in the terahertz frequencies by exciting surface plasmon resonance (SPR) of graphene is proposed. The results show that the proposed SPR gas sensor has high stability and high sensitivity (<italic>S</italic>), and the highest <italic>S</italic><sub>max</sub> (∼147°/RIU) has been obtained by optimizing the Fermi energy, the thickness of the dielectric layer, and the incident light frequency. Moreover, the <italic>S</italic> of the proposed THz sensor for different refractive index (RI) of gas sensing medium (<italic>n</italic><sub>1</sub>) is also discussed.https://ieeexplore.ieee.org/document/8168356/Surface plasmon resonanceterahertz gas sensorgraphene. |
| spellingShingle | Yuanjiang Xiang Jiaqi Zhu Leiming Wu Qi You Banxian Ruan Xiaoyu Dai Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene IEEE Photonics Journal Surface plasmon resonance terahertz gas sensor graphene. |
| title | Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene |
| title_full | Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene |
| title_fullStr | Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene |
| title_full_unstemmed | Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene |
| title_short | Highly Sensitive Terahertz Gas Sensor Based on Surface Plasmon Resonance With Graphene |
| title_sort | highly sensitive terahertz gas sensor based on surface plasmon resonance with graphene |
| topic | Surface plasmon resonance terahertz gas sensor graphene. |
| url | https://ieeexplore.ieee.org/document/8168356/ |
| work_keys_str_mv | AT yuanjiangxiang highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene AT jiaqizhu highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene AT leimingwu highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene AT qiyou highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene AT banxianruan highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene AT xiaoyudai highlysensitiveterahertzgassensorbasedonsurfaceplasmonresonancewithgraphene |