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| Autori principali: | , , , , , |
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| Natura: | Preprint |
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2024
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| Accesso online: | https://arxiv.org/abs/2403.05833 |
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| _version_ | 1866917609618800640 |
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| author | Li, Danyang Bai, Zhengyang Zuo, Xiaoliang Wu, Yuelong Sheng, Jiteng Wu, Haibin |
| author_facet | Li, Danyang Bai, Zhengyang Zuo, Xiaoliang Wu, Yuelong Sheng, Jiteng Wu, Haibin |
| contents | Single-photon terahertz (THz) detection is one of the most demanding technology for a variety of fields and could lead to many breakthroughs. Although its significant progress has been made in the last two decades, operating it at room temperature still remains a great challenge. Here, we demonstrate, for the first time, the room temperature THz detector at single-photon levels based on nonlinear wave mixing in thermal Rydberg atomic vapor. The low-energy THz photons are coherently upconverted to the high-energy optical photons via a nondegenerate Rydberg state involved six-wave-mixing process, and therefore, the single-photon THz detection is achieved by a conventional optical single-photon counting module. The noise equivalent power of such a detector is reached to be 9.5*10^-19 W/Hz^1/2, which is more than four orders of magnitude lower than the state-of-the-art room temperature THz detectors. The optimum quantum efficiency of the whole wave-mixing process is about 4.3% with 40.6 dB dynamic range, and the maximum conversion bandwidth is 172 MHz, which is all-optically controllable. The developed fast and continuous-wave single-photon THz detector at room temperature operation has a great potential to be portable and chip-scale, and could be revolutionary for a wide range of applications in remote sensing, wireless communication, biomedical diagnostics, and quantum optics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_05833 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Room temperature single-photon terahertz detection with thermal Rydberg atoms Li, Danyang Bai, Zhengyang Zuo, Xiaoliang Wu, Yuelong Sheng, Jiteng Wu, Haibin Quantum Physics Optics Single-photon terahertz (THz) detection is one of the most demanding technology for a variety of fields and could lead to many breakthroughs. Although its significant progress has been made in the last two decades, operating it at room temperature still remains a great challenge. Here, we demonstrate, for the first time, the room temperature THz detector at single-photon levels based on nonlinear wave mixing in thermal Rydberg atomic vapor. The low-energy THz photons are coherently upconverted to the high-energy optical photons via a nondegenerate Rydberg state involved six-wave-mixing process, and therefore, the single-photon THz detection is achieved by a conventional optical single-photon counting module. The noise equivalent power of such a detector is reached to be 9.5*10^-19 W/Hz^1/2, which is more than four orders of magnitude lower than the state-of-the-art room temperature THz detectors. The optimum quantum efficiency of the whole wave-mixing process is about 4.3% with 40.6 dB dynamic range, and the maximum conversion bandwidth is 172 MHz, which is all-optically controllable. The developed fast and continuous-wave single-photon THz detector at room temperature operation has a great potential to be portable and chip-scale, and could be revolutionary for a wide range of applications in remote sensing, wireless communication, biomedical diagnostics, and quantum optics. |
| title | Room temperature single-photon terahertz detection with thermal Rydberg atoms |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2403.05833 |