Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal
Bulk Dirac semimetal (BDS) has emerged as a “3D graphene” material for the development of optical devices in the past few years. In this study, a BDS-based tunable highly sensitive terahertz (THz) biosensor is proposed by using a Dirac semimetal/Bragg reflector multilayer structure. The high sensiti...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Biosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-6374/12/11/1050 |
| _version_ | 1797465799058784256 |
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| author | Yuwen Bao Mengjiao Ren Chengpeng Ji Jun Dong Leyong Jiang Xiaoyu Dai |
| author_facet | Yuwen Bao Mengjiao Ren Chengpeng Ji Jun Dong Leyong Jiang Xiaoyu Dai |
| author_sort | Yuwen Bao |
| collection | DOAJ |
| description | Bulk Dirac semimetal (BDS) has emerged as a “3D graphene” material for the development of optical devices in the past few years. In this study, a BDS-based tunable highly sensitive terahertz (THz) biosensor is proposed by using a Dirac semimetal/Bragg reflector multilayer structure. The high sensitivity of the biosensor originates from the sharp Fano resonance peak caused by coupling the Optical Tamm State (OTS) mode and defect mode. Besides, the sensitivity of the proposed structure is sensitive to the Fermi energy of Dirac semimetal and the refractive index of the sensing medium. The maximum sensitivity of 1022°/RIU is obtained by selecting structural and material parameter appropriately, which has certain competitiveness compared to conventional surface plasmon resonance (SPR) sensors. From the standpoint of the fabrication facility and integration, we judged that the BDS-based layered structure has the potential application in biosensor field. |
| first_indexed | 2024-03-09T18:27:42Z |
| format | Article |
| id | doaj.art-b92f35de3e3d45dea99d8c357c707a07 |
| institution | Directory Open Access Journal |
| issn | 2079-6374 |
| language | English |
| last_indexed | 2024-03-09T18:27:42Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biosensors |
| spelling | doaj.art-b92f35de3e3d45dea99d8c357c707a072023-11-24T07:49:08ZengMDPI AGBiosensors2079-63742022-11-011211105010.3390/bios12111050Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac SemimetalYuwen Bao0Mengjiao Ren1Chengpeng Ji2Jun Dong3Leyong Jiang4Xiaoyu Dai5School of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan University, Changsha 410082, ChinaBulk Dirac semimetal (BDS) has emerged as a “3D graphene” material for the development of optical devices in the past few years. In this study, a BDS-based tunable highly sensitive terahertz (THz) biosensor is proposed by using a Dirac semimetal/Bragg reflector multilayer structure. The high sensitivity of the biosensor originates from the sharp Fano resonance peak caused by coupling the Optical Tamm State (OTS) mode and defect mode. Besides, the sensitivity of the proposed structure is sensitive to the Fermi energy of Dirac semimetal and the refractive index of the sensing medium. The maximum sensitivity of 1022°/RIU is obtained by selecting structural and material parameter appropriately, which has certain competitiveness compared to conventional surface plasmon resonance (SPR) sensors. From the standpoint of the fabrication facility and integration, we judged that the BDS-based layered structure has the potential application in biosensor field.https://www.mdpi.com/2079-6374/12/11/1050biosensormode couplingDirac semimetaloptical Tamm state |
| spellingShingle | Yuwen Bao Mengjiao Ren Chengpeng Ji Jun Dong Leyong Jiang Xiaoyu Dai Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal Biosensors biosensor mode coupling Dirac semimetal optical Tamm state |
| title | Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal |
| title_full | Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal |
| title_fullStr | Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal |
| title_full_unstemmed | Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal |
| title_short | Terahertz Biosensor Based on Mode Coupling between Defect Mode and Optical Tamm State with Dirac Semimetal |
| title_sort | terahertz biosensor based on mode coupling between defect mode and optical tamm state with dirac semimetal |
| topic | biosensor mode coupling Dirac semimetal optical Tamm state |
| url | https://www.mdpi.com/2079-6374/12/11/1050 |
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