Deterministic and highly indistinguishable single photons in the telecom C-band
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912376567103488 |
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| author | Hauser, Nico Bayerbach, Matthias Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kamp, Martin Huber-Loyola, Tobias Pfenning, Andreas T. Höfling, Sven Barz, Stefanie |
| author_facet | Hauser, Nico Bayerbach, Matthias Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kamp, Martin Huber-Loyola, Tobias Pfenning, Andreas T. Höfling, Sven Barz, Stefanie |
| contents | Quantum dots are promising candidates for deterministic single-photon sources, yet achieving high photon indistinguishability at telecom wavelengths remains a critical challenge. Here, we report a quantum dot-based single-photon source operating in the telecommunications C-band that achieves a raw two-photon interference visibility of up to (91.7+-0.2)%, thus setting a new benchmark for indistinguishability in this spectral range. The device consists of an indium arsenide (InAs) quantum dot embedded within indium aluminum gallium arsenide (InAlGaAs) and integrated into a circular Bragg grating resonator. We explore multiple optical excitation schemes to optimize coherence and source performance. To our knowledge, this is the first demonstration of two-photon interference visibility exceeding 90% from a quantum-dot emitter in the telecommunications C-band, advancing the viability of solid-state sources for quantum communication and photonic networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09695 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Deterministic and highly indistinguishable single photons in the telecom C-band Hauser, Nico Bayerbach, Matthias Kaupp, Jochen Reum, Yorick Peniakov, Giora Michl, Johannes Kamp, Martin Huber-Loyola, Tobias Pfenning, Andreas T. Höfling, Sven Barz, Stefanie Quantum Physics Quantum dots are promising candidates for deterministic single-photon sources, yet achieving high photon indistinguishability at telecom wavelengths remains a critical challenge. Here, we report a quantum dot-based single-photon source operating in the telecommunications C-band that achieves a raw two-photon interference visibility of up to (91.7+-0.2)%, thus setting a new benchmark for indistinguishability in this spectral range. The device consists of an indium arsenide (InAs) quantum dot embedded within indium aluminum gallium arsenide (InAlGaAs) and integrated into a circular Bragg grating resonator. We explore multiple optical excitation schemes to optimize coherence and source performance. To our knowledge, this is the first demonstration of two-photon interference visibility exceeding 90% from a quantum-dot emitter in the telecommunications C-band, advancing the viability of solid-state sources for quantum communication and photonic networks. |
| title | Deterministic and highly indistinguishable single photons in the telecom C-band |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.09695 |