Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton
Surface plasmon polaritons (SPPs) with noble metals lose the capacity to confine the optical field in the long wavelength region, while surface phonon polaritons (SPhPs) in polar dielectrics show greater ability to achieve high local field, sub-diffraction confinement, and low optical losses in the...
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8469007/ |
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| author | Jiaqi Zhu Banxian Ruan Qi You Leiming Wu Houzhi Cai Xiaoyu Dai Yuanjiang Xiang |
| author_facet | Jiaqi Zhu Banxian Ruan Qi You Leiming Wu Houzhi Cai Xiaoyu Dai Yuanjiang Xiang |
| author_sort | Jiaqi Zhu |
| collection | DOAJ |
| description | Surface plasmon polaritons (SPPs) with noble metals lose the capacity to confine the optical field in the long wavelength region, while surface phonon polaritons (SPhPs) in polar dielectrics show greater ability to achieve high local field, sub-diffraction confinement, and low optical losses in the mid-IR to THz spectral ranges. We propose a hybrid structure based on SPhPs mode with CsI and SPPs mode with graphene in THz spectral ranges. The characteristics of the coupling of these two modes have been analyzed and strong coupling has been confirmed theoretically. The results are applied to an intensity-interrogated terahertz sensor; the highest imaging sensitivity as high as 954 RIU<sup>−1</sup> and a large figure of merit of 74 740 RIU<sup>−1</sup> have been demonstrated. The results could find potential applications in gas detection in the THz band. |
| format | Article |
| id | doaj-art-4bc8971ab13140078f2e09ba1b50d52b |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-4bc8971ab13140078f2e09ba1b50d52b2025-08-20T03:32:32ZengIEEEIEEE Photonics Journal1943-06552018-01-011061910.1109/JPHOT.2018.28701218469007Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon PolaritonJiaqi Zhu0https://orcid.org/0000-0001-7758-0179Banxian Ruan1Qi You2Leiming Wu3Houzhi Cai4Xiaoyu Dai5Yuanjiang Xiang6https://orcid.org/0000-0002-7225-5411Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, ChinaSurface plasmon polaritons (SPPs) with noble metals lose the capacity to confine the optical field in the long wavelength region, while surface phonon polaritons (SPhPs) in polar dielectrics show greater ability to achieve high local field, sub-diffraction confinement, and low optical losses in the mid-IR to THz spectral ranges. We propose a hybrid structure based on SPhPs mode with CsI and SPPs mode with graphene in THz spectral ranges. The characteristics of the coupling of these two modes have been analyzed and strong coupling has been confirmed theoretically. The results are applied to an intensity-interrogated terahertz sensor; the highest imaging sensitivity as high as 954 RIU<sup>−1</sup> and a large figure of merit of 74 740 RIU<sup>−1</sup> have been demonstrated. The results could find potential applications in gas detection in the THz band.https://ieeexplore.ieee.org/document/8469007/Surface plasmon resonancesurface phonon polaritons (SPhPs)terahertz sensorgraphene. |
| spellingShingle | Jiaqi Zhu Banxian Ruan Qi You Leiming Wu Houzhi Cai Xiaoyu Dai Yuanjiang Xiang Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton IEEE Photonics Journal Surface plasmon resonance surface phonon polaritons (SPhPs) terahertz sensor graphene. |
| title | Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton |
| title_full | Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton |
| title_fullStr | Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton |
| title_full_unstemmed | Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton |
| title_short | Ultrasensitive Terahertz Imaging Sensors Based on the Strong Coupling of Surface Phonon Polariton and Graphene Surface Plasmon Polariton |
| title_sort | ultrasensitive terahertz imaging sensors based on the strong coupling of surface phonon polariton and graphene surface plasmon polariton |
| topic | Surface plasmon resonance surface phonon polaritons (SPhPs) terahertz sensor graphene. |
| url | https://ieeexplore.ieee.org/document/8469007/ |
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