Two-Photon Interference from an InAs Quantum Dot emitting in the Telecom C-Band
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2025
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| author | Kim, Jaewon Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kohr, Felix Emmerling, Monika Kamp, Martin Cho, Yong-Hoon Huber-Loyola, Tobias Höfling, Sven Pfenning, Andreas T. |
| author_facet | Kim, Jaewon Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kohr, Felix Emmerling, Monika Kamp, Martin Cho, Yong-Hoon Huber-Loyola, Tobias Höfling, Sven Pfenning, Andreas T. |
| contents | Two-photon interference from an InAs/InAlGaAs quantum dot (QD) emitting in the telecom C-band with a raw two-photon interference visibility of $V_{HOM}=(71.9\pm0.2)$ % is demonstrated. This is achieved by a two-fold approach: an improvement of the molecular beam epitaxial growth for better QDs, and integration of the QDs into an optical circular Bragg grating resonator for a Purcell enhancement of the radiative decay rate. The quantum optical properties of the fabricated device are studied by means of time-correlated single-photon counting under quasi-resonant excitation of the charged exciton line. A reduced lifetime of $T_1=(257.5\pm0.2)$ ps is found corresponding to a Purcell factor of $F_P\geqq(4.7\pm0.5)$. Pronounced anti-bunching of the second-order autocorrelation function at zero time delay $g^{(2)} (0)=(0.0307\pm0.0004)$ confirms the single-photon emission character. The two-photon interference is demonstrated with an unbalanced Mach-Zehnder interferometer in Hong-Ou-Mandel configuration. We discuss strategies how to further improve the indistinguishability, and provide a survey of the state-of-the art. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_15970 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-Photon Interference from an InAs Quantum Dot emitting in the Telecom C-Band Kim, Jaewon Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kohr, Felix Emmerling, Monika Kamp, Martin Cho, Yong-Hoon Huber-Loyola, Tobias Höfling, Sven Pfenning, Andreas T. Quantum Physics Mesoscale and Nanoscale Physics Two-photon interference from an InAs/InAlGaAs quantum dot (QD) emitting in the telecom C-band with a raw two-photon interference visibility of $V_{HOM}=(71.9\pm0.2)$ % is demonstrated. This is achieved by a two-fold approach: an improvement of the molecular beam epitaxial growth for better QDs, and integration of the QDs into an optical circular Bragg grating resonator for a Purcell enhancement of the radiative decay rate. The quantum optical properties of the fabricated device are studied by means of time-correlated single-photon counting under quasi-resonant excitation of the charged exciton line. A reduced lifetime of $T_1=(257.5\pm0.2)$ ps is found corresponding to a Purcell factor of $F_P\geqq(4.7\pm0.5)$. Pronounced anti-bunching of the second-order autocorrelation function at zero time delay $g^{(2)} (0)=(0.0307\pm0.0004)$ confirms the single-photon emission character. The two-photon interference is demonstrated with an unbalanced Mach-Zehnder interferometer in Hong-Ou-Mandel configuration. We discuss strategies how to further improve the indistinguishability, and provide a survey of the state-of-the art. |
| title | Two-Photon Interference from an InAs Quantum Dot emitting in the Telecom C-Band |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.15970 |