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Article Abstract
Chiral quantum interfaces are a compelling platform for the mapping of spin to path, offering innovative strategies for chiral single photon routing. Glide-plane photonic crystal waveguide (GPW) embedded with quantum dots (QDs) enables both Purcell enhancement and chiral coupling, making it a promising candidate for chiral quantum interfaces. However, the continuous band structure in the GPW enables the chiral quantum interface that radiates bidirectionally. Here, we demonstrate a unidirectional chiral quantum interface through the coupling of an InAs QD to the spin-locking mode of a single-mode GaAs microring resonator. This chiral coupling enables dynamic control over the emission direction and spin of the QD through modulation of the magnetic field. The interface exhibits a near-unity field-independent cavity-assisted chiral contrast, a Purcell factor of 1.58 and a single-photon purity of (0) = 0.0795 ± 0.009. This capability significantly expands the application scope of chiral quantum optics and develops scalable networks based on chiral quantum photonics.
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