Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance
Field effect transistors have shown promising performance as terahertz (THz) detectors over the past few decades. Recently, a quantum phenomenon, the in-plane photoelectric effect, was discovered as a novel detection mechanism in gated two-dimensional electron gases (2DEGs), and devices based on thi...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-02-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2023-0864 |
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| _version_ | 1850063783962083328 |
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| author | Chen Ran Xia Ruqiao Griffiths Jonathan Beere Harvey E. Ritchie David A. Michailow Wladislaw |
| author_facet | Chen Ran Xia Ruqiao Griffiths Jonathan Beere Harvey E. Ritchie David A. Michailow Wladislaw |
| author_sort | Chen Ran |
| collection | DOAJ |
| description | Field effect transistors have shown promising performance as terahertz (THz) detectors over the past few decades. Recently, a quantum phenomenon, the in-plane photoelectric effect, was discovered as a novel detection mechanism in gated two-dimensional electron gases (2DEGs), and devices based on this effect, photoelectric tunable-step (PETS) THz detectors, have been proposed as sensitive THz detectors. Here, we demonstrate a PETS THz detector based on GaAs/AlGaAs heterojunction using a dipole antenna. We investigate the dependence of the in-plane photoelectric effect on parameters including the dimensions and the operating temperature of the device. Two figures of merit within the 2DEG, the maximum electric field and the radiation-induced ac-potential difference, are simulated to determine the optimal design of the PETS detector antenna. We identify the optimal antenna gap size, metal thickness, and 2DEG depth, and demonstrate the first PETS detector with a symmetric dipole antenna, which shows high-speed detection of 1.9 THz radiation with a strong photoresponse. Our findings deepen the understanding of the in-plane photoelectric effect and provide a universal guidance for the design of future PETS THz detectors. |
| format | Article |
| id | doaj-art-1b0ab2366930453db729d102ec3c8bfc |
| institution | DOAJ |
| issn | 2192-8614 |
| language | English |
| publishDate | 2024-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-1b0ab2366930453db729d102ec3c8bfc2025-08-20T02:49:30ZengDe GruyterNanophotonics2192-86142024-02-0113101917192810.1515/nanoph-2023-0864Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performanceChen Ran0Xia Ruqiao1Griffiths Jonathan2Beere Harvey E.3Ritchie David A.4Michailow Wladislaw5Cavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKCavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKCavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKCavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKCavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKCavendish Laboratory, University of Cambridge, CB3 0HECambridge, UKField effect transistors have shown promising performance as terahertz (THz) detectors over the past few decades. Recently, a quantum phenomenon, the in-plane photoelectric effect, was discovered as a novel detection mechanism in gated two-dimensional electron gases (2DEGs), and devices based on this effect, photoelectric tunable-step (PETS) THz detectors, have been proposed as sensitive THz detectors. Here, we demonstrate a PETS THz detector based on GaAs/AlGaAs heterojunction using a dipole antenna. We investigate the dependence of the in-plane photoelectric effect on parameters including the dimensions and the operating temperature of the device. Two figures of merit within the 2DEG, the maximum electric field and the radiation-induced ac-potential difference, are simulated to determine the optimal design of the PETS detector antenna. We identify the optimal antenna gap size, metal thickness, and 2DEG depth, and demonstrate the first PETS detector with a symmetric dipole antenna, which shows high-speed detection of 1.9 THz radiation with a strong photoresponse. Our findings deepen the understanding of the in-plane photoelectric effect and provide a universal guidance for the design of future PETS THz detectors.https://doi.org/10.1515/nanoph-2023-0864two-dimensional electron gasin-plane photoelectric effectphotoelectric tunable-step detectorfar-infrared detection |
| spellingShingle | Chen Ran Xia Ruqiao Griffiths Jonathan Beere Harvey E. Ritchie David A. Michailow Wladislaw Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance Nanophotonics two-dimensional electron gas in-plane photoelectric effect photoelectric tunable-step detector far-infrared detection |
| title | Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance |
| title_full | Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance |
| title_fullStr | Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance |
| title_full_unstemmed | Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance |
| title_short | Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance |
| title_sort | photoelectric tunable step terahertz detectors a study on optimal antenna parameters speed and temperature performance |
| topic | two-dimensional electron gas in-plane photoelectric effect photoelectric tunable-step detector far-infrared detection |
| url | https://doi.org/10.1515/nanoph-2023-0864 |
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