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arXiv · 2511.07640

Chiral Quantum Optics with Scalable Quantum Dot Dimers

L. Hallacy·D. Hallett·A. Fenzl·N. J. Martin·R. Dost·A. Verma·J. Fletcher·I. Farrer·L. Antwis·M. S. Skolnick·L. R. Wilson
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Abstract

We present a scalable method for electrically tuning multiple spatially separated quantum dots embedded in photonic crystal waveguides. Ion implantation into the top p-doped layer of a p-i-n diode creates high-resistivity tracks, providing electrical isolation between adjacent regions. Unlike physical etching, this method preserves the guided-mode profile of the photonic crystal without introducing significant scattering, limiting refractive index perturbations to below 0.001 with 0.01% additional loss. In contrast, physical etching can reduce single-band transmission by more than 30% for an etch width of 100 nm. We demonstrate the applicability of our approach using quantum dots embedded in a glideplane photonic crystal waveguide, controlling the detuning between different spin-state combinations of two highly chiral quantum dots coupled to the same mode. Second-order photon correlation measurements provide a sensitive probe of the chirality-dependent photon statistics, which are in good agreement with a waveguide-QED master equation model. Our results mark an important step towards scalable, multi-emitter architectures for chiral quantum networks.

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L. Hallacy, D. Hallett, A. Fenzl, N. J. Martin, R. Dost, A. Verma, J. Fletcher, I. Farrer, L. Antwis, M. S. Skolnick, L. R. Wilson. 2025-11-10. Chiral Quantum Optics with Scalable Quantum Dot Dimers. https://arxiv.org/abs/2511.07640

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