Efficient, indistinguishable telecom C-band photons using a tapered nanobeam
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arXiv
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2024
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| author | Rahaman, Mohammad Habibur Harper, Samuel Lee, Chang-Min Kim, Kyu-Young Buyukkaya, Mustafa Atabey Patel, Victor J. Hawkins, Samuel D. Kim, Je-Hyung Addamane, Sadhvikas Waks, Edo |
| author_facet | Rahaman, Mohammad Habibur Harper, Samuel Lee, Chang-Min Kim, Kyu-Young Buyukkaya, Mustafa Atabey Patel, Victor J. Hawkins, Samuel D. Kim, Je-Hyung Addamane, Sadhvikas Waks, Edo |
| contents | Telecom C-band single photons exhibit the lowest attenuation in optical fibers, enabling long-haul quantum-secured communication. However, efficient coupling with optical fibers is crucial for these single photons to be effective carriers in long-distance transmission. In this work, we demonstrate an efficient fiber-coupled single photon source at the telecom C-band using InAs/InP quantum dots coupled to a tapered nanobeam. The tapered nanobeam structure facilitates directional emission that is mode-matched to a lensed fiber, resulting in a collection efficiency of up to 65% from the nanobeam to a single-mode fiber. Using this approach, we demonstrate single photon count rates of 575 $\pm$ 5 Kcps and a single photon purity of $g^2$ (0) = 0.015 $\pm$ 0.003. Additionally, we demonstrate Hong-Ou Mandel interference from the emitted photons with a visibility of 0.84 $\pm$ 0.06. From these measurements, we determine a photon coherence time of 450 $\pm$ 20 ps, a factor of just 8.3 away from the lifetime limit. This work represents an important step towards the development of telecom C-band single-photon sources emitting bright, pure, and indistinguishable photons, which are necessary to realize fiber-based long-distance quantum networks |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_01562 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient, indistinguishable telecom C-band photons using a tapered nanobeam Rahaman, Mohammad Habibur Harper, Samuel Lee, Chang-Min Kim, Kyu-Young Buyukkaya, Mustafa Atabey Patel, Victor J. Hawkins, Samuel D. Kim, Je-Hyung Addamane, Sadhvikas Waks, Edo Quantum Physics Telecom C-band single photons exhibit the lowest attenuation in optical fibers, enabling long-haul quantum-secured communication. However, efficient coupling with optical fibers is crucial for these single photons to be effective carriers in long-distance transmission. In this work, we demonstrate an efficient fiber-coupled single photon source at the telecom C-band using InAs/InP quantum dots coupled to a tapered nanobeam. The tapered nanobeam structure facilitates directional emission that is mode-matched to a lensed fiber, resulting in a collection efficiency of up to 65% from the nanobeam to a single-mode fiber. Using this approach, we demonstrate single photon count rates of 575 $\pm$ 5 Kcps and a single photon purity of $g^2$ (0) = 0.015 $\pm$ 0.003. Additionally, we demonstrate Hong-Ou Mandel interference from the emitted photons with a visibility of 0.84 $\pm$ 0.06. From these measurements, we determine a photon coherence time of 450 $\pm$ 20 ps, a factor of just 8.3 away from the lifetime limit. This work represents an important step towards the development of telecom C-band single-photon sources emitting bright, pure, and indistinguishable photons, which are necessary to realize fiber-based long-distance quantum networks |
| title | Efficient, indistinguishable telecom C-band photons using a tapered nanobeam |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2404.01562 |