Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917376773062656 |
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| author | Behrends, Robert Rickert, Lucas Kewitz, Nils D. Helversen, Martin v. Saha, Pratim K. Lach, Mareike Kaupp, Jochen Reum, Yorick Tobias-Huber-Loyola Höfling, Sven Pfenning, Andreas Heindel, Tobias |
| author_facet | Behrends, Robert Rickert, Lucas Kewitz, Nils D. Helversen, Martin v. Saha, Pratim K. Lach, Mareike Kaupp, Jochen Reum, Yorick Tobias-Huber-Loyola Höfling, Sven Pfenning, Andreas Heindel, Tobias |
| contents | High-performance single-photon sources at telecom C-band wavelentghs are key building blocks for applications in long-distance quantum communication. Here, we report the generation of highly indistinguishable, single photons at a clock-rate of 2.5 GHz. This is achieved by coherently driving the biexciton transition ($T_1^\mathrm{XX}=64(1)\,$ps) of a semiconductor quantum dot embedded in a microcavity with strong asymmetric Purcell enhancement. Employing pulsed two-photon resonant excitation, strong multiphoton suppression with $g^{(2)}(0) < 4\%$ and high two-photon-interference visibility of $V_\mathrm{raw}> 85\%$ is observed. The observed photon indistinguishability is close to the theoretical limit expected for the photonically engineered radiative cascade and matches values obtained at lower repetition rates. Our results show a substantial advancement towards interference-based quantum information protocols at unprecedented data rates in the telecom C-Band. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_26651 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths Behrends, Robert Rickert, Lucas Kewitz, Nils D. Helversen, Martin v. Saha, Pratim K. Lach, Mareike Kaupp, Jochen Reum, Yorick Tobias-Huber-Loyola Höfling, Sven Pfenning, Andreas Heindel, Tobias Mesoscale and Nanoscale Physics Quantum Physics High-performance single-photon sources at telecom C-band wavelentghs are key building blocks for applications in long-distance quantum communication. Here, we report the generation of highly indistinguishable, single photons at a clock-rate of 2.5 GHz. This is achieved by coherently driving the biexciton transition ($T_1^\mathrm{XX}=64(1)\,$ps) of a semiconductor quantum dot embedded in a microcavity with strong asymmetric Purcell enhancement. Employing pulsed two-photon resonant excitation, strong multiphoton suppression with $g^{(2)}(0) < 4\%$ and high two-photon-interference visibility of $V_\mathrm{raw}> 85\%$ is observed. The observed photon indistinguishability is close to the theoretical limit expected for the photonically engineered radiative cascade and matches values obtained at lower repetition rates. Our results show a substantial advancement towards interference-based quantum information protocols at unprecedented data rates in the telecom C-Band. |
| title | Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2603.26651 |