Indistinguishable single photons from nanowire quantum dots in the telecom O-band

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±0.003 under above-band excitation. Furthermore, we characterize two-photon interference via Hong–Ou–Mandel measurements and achieve a photon indistinguishability of 81.1%±3.7% with a temporal postselection of a 300 ps time window and 5.6%±1.5% without temporal postselection. We estimate 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.

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Publication Details

Journal
Applied Physics Letters
Published
2025-10-20
DOI
https://doi.org/10.1063/5.0271146
Citations
1
Primary Topic
Quantum Information and Cryptography
Type
article
Field-Weighted Citation Impact
2.48

Funders

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Indistinguishable single photons from nanowire quantum dots in the telecom O-band

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Indistinguishable single photons from nanowire quantum dots in the telecom O-band

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article en
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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 g2(0)=0.006±0.003 under above-band excitation. Furthermore, we characterize two-photon interference via Hong–Ou–Mandel measurements and achieve a photon indistinguishability of 81.1%±3.7% with a temporal postselection of a 300 ps time window and 5.6%±1.5% without temporal postselection. We estimate 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.

Applied Physics LettersVol. 127(16)
National Yang Ming Chiao Tung University (TW), University of Ottawa (CA), Research Center for Humanities and Social Sciences, Academia Sinica (TW), National Research Council Canada (CA), KTH Royal Institute of Technology (SE)
VINNOVA, Natural Sciences and Engineering Research Council of Canada, Wallenberg Centre for Molecular and Translational Medicine, Wallenberg Center for Quantum Technology, Chalmers University of Technology
Openalex Percentile: Top 8%
Quantum Information and Cryptography
2.48
DOIOpen Access PDFOpenAlex
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