Graphene plasmons-enhanced terahertz response assisted by metallic gratings
Terahertz detectors based on two-dimensional Dirac materials offer a new approach for room-temperature terahertz detection with high response and low noise. However, these devices can hardly show high response over a broad frequency range, mainly due to the poor absorption caused by their ultrathin...
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-11-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2022-0455 |
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| author | Yu Anqi Yang Zhenyu Cai Miao Zhang Huiping Tian Zhengan Guo Xuguang Wang Lanxia Balakin Alexei V. Shkurinov Alexander P. Zhu YiMing |
| author_facet | Yu Anqi Yang Zhenyu Cai Miao Zhang Huiping Tian Zhengan Guo Xuguang Wang Lanxia Balakin Alexei V. Shkurinov Alexander P. Zhu YiMing |
| author_sort | Yu Anqi |
| collection | DOAJ |
| description | Terahertz detectors based on two-dimensional Dirac materials offer a new approach for room-temperature terahertz detection with high response and low noise. However, these devices can hardly show high response over a broad frequency range, mainly due to the poor absorption caused by their ultrathin nature. Here we apply metallic gratings to enhance the excitation efficiency of graphene plasmons. When nonzero source-drain bias is applied, graphene plasmons can generate terahertz response orthogonal to the polarization of the incidence. The response is attributed to the orthogonal overdamped plasmon rectification effect, and graphene plasmons-enhanced photo-thermoelectric effect. By comparing the normalized on/off ratio, the metallic gratings are found to effectively enhance the coupling efficiency between graphene plasmons and THz incidence, and thus the absorption and responsivity. The results are beneficial for improving the response of room temperature THz detectors. |
| format | Article |
| id | doaj-art-9229a0dd50c64a438bed48d7f0ffb10b |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2022-11-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-9229a0dd50c64a438bed48d7f0ffb10b2024-11-25T11:19:08ZengDe GruyterNanophotonics2192-86142022-11-0111214737474510.1515/nanoph-2022-0455Graphene plasmons-enhanced terahertz response assisted by metallic gratingsYu Anqi0Yang Zhenyu1Cai Miao2Zhang Huiping3Tian Zhengan4Guo Xuguang5Wang Lanxia6Balakin Alexei V.7Shkurinov Alexander P.8Zhu YiMing9Shanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai International Travel Health Care Center (Shanghai Customs Port Clinic), 2090 Jinqiao Road, Shanghai200125, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaShanghai Key Lab of Modern Optical System, Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai200093, ChinaTerahertz detectors based on two-dimensional Dirac materials offer a new approach for room-temperature terahertz detection with high response and low noise. However, these devices can hardly show high response over a broad frequency range, mainly due to the poor absorption caused by their ultrathin nature. Here we apply metallic gratings to enhance the excitation efficiency of graphene plasmons. When nonzero source-drain bias is applied, graphene plasmons can generate terahertz response orthogonal to the polarization of the incidence. The response is attributed to the orthogonal overdamped plasmon rectification effect, and graphene plasmons-enhanced photo-thermoelectric effect. By comparing the normalized on/off ratio, the metallic gratings are found to effectively enhance the coupling efficiency between graphene plasmons and THz incidence, and thus the absorption and responsivity. The results are beneficial for improving the response of room temperature THz detectors.https://doi.org/10.1515/nanoph-2022-0455graphene plasmonsmetallic gratingsphoto-thermoelectric effectplasmon rectification effectterahertz detector |
| spellingShingle | Yu Anqi Yang Zhenyu Cai Miao Zhang Huiping Tian Zhengan Guo Xuguang Wang Lanxia Balakin Alexei V. Shkurinov Alexander P. Zhu YiMing Graphene plasmons-enhanced terahertz response assisted by metallic gratings Nanophotonics graphene plasmons metallic gratings photo-thermoelectric effect plasmon rectification effect terahertz detector |
| title | Graphene plasmons-enhanced terahertz response assisted by metallic gratings |
| title_full | Graphene plasmons-enhanced terahertz response assisted by metallic gratings |
| title_fullStr | Graphene plasmons-enhanced terahertz response assisted by metallic gratings |
| title_full_unstemmed | Graphene plasmons-enhanced terahertz response assisted by metallic gratings |
| title_short | Graphene plasmons-enhanced terahertz response assisted by metallic gratings |
| title_sort | graphene plasmons enhanced terahertz response assisted by metallic gratings |
| topic | graphene plasmons metallic gratings photo-thermoelectric effect plasmon rectification effect terahertz detector |
| url | https://doi.org/10.1515/nanoph-2022-0455 |
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