Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918205114548224 |
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| author | Iso, Ozora Onoda, Koya Fairbairn, Nicola J. Yabuno, Masahiro Terai, Hirotaka Miki, Shigehito Shimizu, Ryosuke |
| author_facet | Iso, Ozora Onoda, Koya Fairbairn, Nicola J. Yabuno, Masahiro Terai, Hirotaka Miki, Shigehito Shimizu, Ryosuke |
| contents | Joint spectral measurements are a powerful tool for characterising biphoton spectral correlation, which is crucial for quantum information and communication technologies. In these applications, highly pure biphoton states are essential in any time- and frequency-mode, often obviating the need for time-resolved measurements. Conversely, spectroscopy utilising entangled photon pairs is gaining significant attention for its ability to unveil molecular dynamics, a field that critically demands time-resolved capabilities. Here, we introduce a novel methodology for capturing a biphoton spectrum that comprises visible and near-infrared photons, resulting in a three-fold non-degenerate joint spectrum. Our system employs two non-scanning spectrographs: a fibre spectrograph for near-infrared photons and a delay-line-anode single-photon imager for visible photons. We successfully measure the joint spectral intensity by leveraging a time-tagging acquisition strategy. Furthermore, our approach uniquely enables time-resolved joint spectral measurements with a temporal resolution of approximately 150 ps. This methodology bridges the gap between the requirements for pure biphoton states and the need for dynamic insights in quantum spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_01836 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions Iso, Ozora Onoda, Koya Fairbairn, Nicola J. Yabuno, Masahiro Terai, Hirotaka Miki, Shigehito Shimizu, Ryosuke Quantum Physics Joint spectral measurements are a powerful tool for characterising biphoton spectral correlation, which is crucial for quantum information and communication technologies. In these applications, highly pure biphoton states are essential in any time- and frequency-mode, often obviating the need for time-resolved measurements. Conversely, spectroscopy utilising entangled photon pairs is gaining significant attention for its ability to unveil molecular dynamics, a field that critically demands time-resolved capabilities. Here, we introduce a novel methodology for capturing a biphoton spectrum that comprises visible and near-infrared photons, resulting in a three-fold non-degenerate joint spectrum. Our system employs two non-scanning spectrographs: a fibre spectrograph for near-infrared photons and a delay-line-anode single-photon imager for visible photons. We successfully measure the joint spectral intensity by leveraging a time-tagging acquisition strategy. Furthermore, our approach uniquely enables time-resolved joint spectral measurements with a temporal resolution of approximately 150 ps. This methodology bridges the gap between the requirements for pure biphoton states and the need for dynamic insights in quantum spectroscopy. |
| title | Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.01836 |