Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance
This paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on...
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MDPI AG
2023-09-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/9/1802 |
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| author | Runing Lai Hao Chen Zigang Zhou Zao Yi Bin Tang Jing Chen Yougen Yi Chaojun Tang Jianguo Zhang Tangyou Sun |
| author_facet | Runing Lai Hao Chen Zigang Zhou Zao Yi Bin Tang Jing Chen Yougen Yi Chaojun Tang Jianguo Zhang Tangyou Sun |
| author_sort | Runing Lai |
| collection | DOAJ |
| description | This paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on top. COMSOL simulation represents that the five absorption peaks under TE polarization are at <i>f</i><sub>I</sub> = 1.99 THz (95.82%), <i>f</i><sub>Ⅱ</sub> = 6.00 THz (98.47%), <i>f</i><sub>Ⅲ</sub> = 7.37 THz (98.72%), <i>f</i><sub>Ⅳ</sub> = 8.47 THz (99.87%), and <i>f</i><sub>V</sub> = 9.38 THz (97.20%), respectively, which is almost consistent with the absorption performance under TM polarization. In contrast to noble metal absorbers, its absorption rates and resonance frequencies can be dynamically regulated by controlling the Fermi level and relaxation time of graphene. In addition, the device can maintain high absorptivity at 0~50° in TE polarization and 0~40° in TM polarization. The maximum refractive index sensitivity can reach <i>S</i><sub>V</sub> = 1.75 THz/RIU, and the maximum figure of merit (FOM) can reach FOM<sub>V</sub> = 12.774 RIU<sup>−1</sup>. In conclusion, our design has the properties of dynamic tunability, polarization independence, wide-incident-angle absorption, and fine refractive index sensitivity. We believe that the device has potential applications in photodetectors, active optoelectronic devices, sensors, and other related fields. |
| first_indexed | 2024-03-10T22:26:42Z |
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| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T22:26:42Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-0c2b8e7ecb23475ba8e8d9ecc5081f142023-11-19T12:00:50ZengMDPI AGMicromachines2072-666X2023-09-01149180210.3390/mi14091802Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing PerformanceRuning Lai0Hao Chen1Zigang Zhou2Zao Yi3Bin Tang4Jing Chen5Yougen Yi6Chaojun Tang7Jianguo Zhang8Tangyou Sun9Joint Laboratory for Extreme Conditions Matter Properties, Tianfu Institute of Research and Innovation, State Key Laboratory of Environmental Friendly Energy Materials, Key Laboratory of Manufacturing Process Testing Technology of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaJoint Laboratory for Extreme Conditions Matter Properties, Tianfu Institute of Research and Innovation, State Key Laboratory of Environmental Friendly Energy Materials, Key Laboratory of Manufacturing Process Testing Technology of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaJoint Laboratory for Extreme Conditions Matter Properties, Tianfu Institute of Research and Innovation, State Key Laboratory of Environmental Friendly Energy Materials, Key Laboratory of Manufacturing Process Testing Technology of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaJoint Laboratory for Extreme Conditions Matter Properties, Tianfu Institute of Research and Innovation, State Key Laboratory of Environmental Friendly Energy Materials, Key Laboratory of Manufacturing Process Testing Technology of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, ChinaCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Physics and Electronics, Central South University, Changsha 410083, ChinaCollege of Science, Zhejiang University of Technology, Hangzhou 310023, ChinaDepartment of Physics, Jinzhong University, Jinzhong 030619, ChinaGuangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, ChinaThis paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on top. COMSOL simulation represents that the five absorption peaks under TE polarization are at <i>f</i><sub>I</sub> = 1.99 THz (95.82%), <i>f</i><sub>Ⅱ</sub> = 6.00 THz (98.47%), <i>f</i><sub>Ⅲ</sub> = 7.37 THz (98.72%), <i>f</i><sub>Ⅳ</sub> = 8.47 THz (99.87%), and <i>f</i><sub>V</sub> = 9.38 THz (97.20%), respectively, which is almost consistent with the absorption performance under TM polarization. In contrast to noble metal absorbers, its absorption rates and resonance frequencies can be dynamically regulated by controlling the Fermi level and relaxation time of graphene. In addition, the device can maintain high absorptivity at 0~50° in TE polarization and 0~40° in TM polarization. The maximum refractive index sensitivity can reach <i>S</i><sub>V</sub> = 1.75 THz/RIU, and the maximum figure of merit (FOM) can reach FOM<sub>V</sub> = 12.774 RIU<sup>−1</sup>. In conclusion, our design has the properties of dynamic tunability, polarization independence, wide-incident-angle absorption, and fine refractive index sensitivity. We believe that the device has potential applications in photodetectors, active optoelectronic devices, sensors, and other related fields.https://www.mdpi.com/2072-666X/14/9/1802terahertzgraphenepenta-band absorptiondynamic tunabilitywide-angle absorptionhigh figure of merit |
| spellingShingle | Runing Lai Hao Chen Zigang Zhou Zao Yi Bin Tang Jing Chen Yougen Yi Chaojun Tang Jianguo Zhang Tangyou Sun Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance Micromachines terahertz graphene penta-band absorption dynamic tunability wide-angle absorption high figure of merit |
| title | Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance |
| title_full | Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance |
| title_fullStr | Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance |
| title_full_unstemmed | Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance |
| title_short | Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance |
| title_sort | design of a penta band graphene based terahertz metamaterial absorber with fine sensing performance |
| topic | terahertz graphene penta-band absorption dynamic tunability wide-angle absorption high figure of merit |
| url | https://www.mdpi.com/2072-666X/14/9/1802 |
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