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 g2(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 ∼28%. 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.
@article{arxiv.2503.12116,
title = {Indistinguishable Single Photons from Nanowire Quantum Dots in the Telecom O-Band},
author = {Mohammed K. Alqedra and Chiao-Tzu Huang and Wen-Hao Chang and Sofiane Haffouz and Philip J. Poole and Dan Dalacu and Ali W. Elshaari and Val Zwiller},
journal= {arXiv preprint arXiv:2503.12116},
year = {2025}
}