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A quantum-coherent photon–emitter interface in the original telecom band
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DOI：10.1038/s41565-026-02156-7.png)
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Abstract
En 中文
Quantum dots have set benchmarks that far surpass other quantum emitters owing to their ability to deliver high-quality, high-rate and pure photons. However, achieving these exceptional capabilities at telecom wavelengths, bridging the gap to fibre-optic infrastructure and scalable silicon photonics, remains a challenge. Overcoming this difficulty demands high-quality quantum materials and devices that, despite extensive efforts, have not yet been realized. Here we demonstrate waveguide-integrated InAs quantum dots and realize a fully quantum-coherent photon–emitter interface operating in the original telecommunication band (or O-band, 1,260–1,360 nm). We record transform-limited linewidths only 8% broader than the inverse lifetime and bright 41.7-MHz emission rate under 80-MHz π-pulse excitation. These findings showcase the potential of quantum dots for scalable quantum networks. Waveguide-integrated InAs quantum dots produce quantum-coherent emission in the O-band with promising optical characteristics for scalable quantum networks.
Keywords:
Quantum dots
Quantum coherence
Telecommunication band
Waveguide integration
Scalable quantum networks
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34.9
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4.8K
Citations:
8.1W
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