Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure
A highly sensitive room-temperature graphene photothermoelectric terahertz detector, with an efficient optical coupling structure of asymmetric logarithmic antenna, was fabricated by planar micro-nano processing technology and two-dimensional material transfer techniques. The designed logarithmic an...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/6/3249 |
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| author | Liang Hong Lanxia Wang Miao Cai Yifan Yao Xuguang Guo Yiming Zhu |
| author_facet | Liang Hong Lanxia Wang Miao Cai Yifan Yao Xuguang Guo Yiming Zhu |
| author_sort | Liang Hong |
| collection | DOAJ |
| description | A highly sensitive room-temperature graphene photothermoelectric terahertz detector, with an efficient optical coupling structure of asymmetric logarithmic antenna, was fabricated by planar micro-nano processing technology and two-dimensional material transfer techniques. The designed logarithmic antenna acts as an optical coupling structure to effectively localize the incident terahertz waves at the source end, thus forming a temperature gradient in the device channel and inducing the thermoelectric terahertz response. At zero bias, the device has a high photoresponsivity of 1.54 A/W, a noise equivalent power of 19.8 pW/Hz<sup>1/2</sup>, and a response time of 900 ns at 105 GHz. Through qualitative analysis of the response mechanism of graphene PTE devices, we find that the electrode-induced doping of graphene channel near the metal-graphene contacts play a key role in the terahertz PTE response. This work provides an effective way to realize high sensitivity terahertz detectors at room temperature. |
| first_indexed | 2024-03-11T05:55:33Z |
| format | Article |
| id | doaj.art-a6bf33563a574fe3a3f2e81dc96fd0b8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T05:55:33Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a6bf33563a574fe3a3f2e81dc96fd0b82023-11-17T13:48:03ZengMDPI AGSensors1424-82202023-03-01236324910.3390/s23063249Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling StructureLiang Hong0Lanxia Wang1Miao Cai2Yifan Yao3Xuguang Guo4Yiming Zhu5Terahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaTerahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaTerahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaTerahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaTerahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaTerahertz Technology Innovation Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, ChinaA highly sensitive room-temperature graphene photothermoelectric terahertz detector, with an efficient optical coupling structure of asymmetric logarithmic antenna, was fabricated by planar micro-nano processing technology and two-dimensional material transfer techniques. The designed logarithmic antenna acts as an optical coupling structure to effectively localize the incident terahertz waves at the source end, thus forming a temperature gradient in the device channel and inducing the thermoelectric terahertz response. At zero bias, the device has a high photoresponsivity of 1.54 A/W, a noise equivalent power of 19.8 pW/Hz<sup>1/2</sup>, and a response time of 900 ns at 105 GHz. Through qualitative analysis of the response mechanism of graphene PTE devices, we find that the electrode-induced doping of graphene channel near the metal-graphene contacts play a key role in the terahertz PTE response. This work provides an effective way to realize high sensitivity terahertz detectors at room temperature.https://www.mdpi.com/1424-8220/23/6/3249graphenephotothermoelectricterahertz detectornoise equivalent power |
| spellingShingle | Liang Hong Lanxia Wang Miao Cai Yifan Yao Xuguang Guo Yiming Zhu Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure Sensors graphene photothermoelectric terahertz detector noise equivalent power |
| title | Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure |
| title_full | Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure |
| title_fullStr | Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure |
| title_full_unstemmed | Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure |
| title_short | Sensitive Room-Temperature Graphene Photothermoelectric Terahertz Detector Based on Asymmetric Antenna Coupling Structure |
| title_sort | sensitive room temperature graphene photothermoelectric terahertz detector based on asymmetric antenna coupling structure |
| topic | graphene photothermoelectric terahertz detector noise equivalent power |
| url | https://www.mdpi.com/1424-8220/23/6/3249 |
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