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arXiv · 2508.04584

Electrical control of quantum dots in GaAs-on-insulator waveguides for coherent single-photon generation

Hanna Salamon·Ying Wang·Arnulf Snedker-Nielsen·Atefeh Shadmani·Rüdiger Schott·Mircea Balauroiu·Nicolas Volet·Arne Ludwig·Leonardo Midolo
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Abstract

The integration of coherent quantum emitters with silicon photonic platforms essential for scalable quantum technologies. We demonstrate electrically controlled self-assembled quantum dots embedded in GaAs waveguides bonded onto a SiO2/Si substrate and coupled to low-loss SiN waveguides. Our approach uses a die-to-die adhesive bonding process to realize a GaAs-on-insulator platform incorporating a p-i-n junction for charge noise suppression and Stark tuning of excitonic transitions. Resonance fluorescence measurements reveal narrow optical linewidths below 2 {\mu}eV and high single-photon purity, matching the performance of unprocessed GaAs devices. These results establish a practical route to integrate high-coherence quantum light sources with mature silicon photonics, enabling scalable quantum photonic integrated circuits

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Hanna Salamon, Ying Wang, Arnulf Snedker-Nielsen, Atefeh Shadmani, Rüdiger Schott, Mircea Balauroiu, Nicolas Volet, Arne Ludwig, Leonardo Midolo. 2025-08-06. Electrical control of quantum dots in GaAs-on-insulator waveguides for coherent single-photon generation. https://arxiv.org/abs/2508.04584

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