Indistinguishable Single Photons from Nanowire Quantum Dots in the Telecom O-Band

• URL: http://arxiv.org/abs/2503.12116v1
• Date: Sat, 15 Mar 2025 12:52:55 GMT
• Title: Indistinguishable Single Photons from Nanowire Quantum Dots in the Telecom O-Band
• Authors: Mohammed K. Alqedra, Chiao-Tzu Huang, Wen-Hao Chang, Sofiane Haffouz, Philip J. Poole, Dan Dalacu, Ali W. Elshaari, Val Zwiller,
• Abstract summary: We demonstrate high-purity, indistinguishable single-photon generation in a nanowire quantum dot at telecom wavelengths.<n>Results highlight the potential of nanowire quantum dots as a promising source of telecom single photons for photonic quantum applications.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: On-demand single-photon sources operating at telecom wavelengths are crucial for quantum communication and photonic quantum technologies. In this work, we demonstrate high-purity, indistinguishable single-photon generation in the telecom O-band from an InAsP/InP nanowire quantum dot. We measured a single-photon purity of $g^2(0)=0.006(3)$ under aboveband excitation. Furthermore, we characterize two-photon interference via Hong-Ou-Mandel measurements and achieve a photon indistinguishability of $94.6\,\%$ with a temporal postselection of 100 ps time window and $5.58\,\%$ without temporal postselection. We measure a first-lens source efficiency of $\sim28\,\%$. These results highlight the potential of nanowire quantum dots as a promising source of telecom single photons for photonic quantum applications, offering deterministic positioning, efficient photon extraction, and scalable production.

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