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Chiral coupling occurs when a semiconductor quantum dot (QD) is positioned close to a C-Point (chiral point) of a nano-photonic waveguide. In these conditions, there is a strong dependence of the propagation direction on the circular polarization of the optical mode, with spin-up and spin-down exciton spins coupling to opposite propagation directions. This provides a mechanism by which a QD can impart a
Early work at Sheffield focused on InAs/GaAs QDs in GaAs nanobeam waveguides, where spin-dependent directional photoluminescence and initialization were observed [2, 3]. The spin-dependent phase shift deduced from analysis of the directional transmission data was around
This work was supported by EPSRC Programme Grants EP/V026496/1 and the EPSRC Quantum Communications Hub Grant EP/T001011/1.
References
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