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- W3100118005 abstract "We report on the experimental study and numerical analysis of chiral light-matter coupling in deterministically fabricated quantum dot (QD) waveguide structures. We apply in situ electron beam lithography to deterministically integrate single InGaAs/GaAs QDs into GaAs-DBR waveguides to systematically explore the dependence of chiral coupling on the position of the QD inside the waveguide. By a series of microphotoluminescence measurements, we determine the directionality contrast of emission into left and right traveling waveguide modes revealing a maximum of 0.93 for highly off-center QDs and observe an oscillation of this contrast depending on the QD position. In numerical simulations we obtain insight into chiral light-matter coupling by computing the light field emitted by a circularly polarized source and its overlap with multiple guided modes of the structure, which enables us to calculate directional β-factors for the quantum emitters. The calculated dependence of the directionality on the off-center QD position is in good agreement with the experimental data. It confirms the control of chiral effects in deterministically fabricated QD-waveguide systems with high potential for future nonreciprocal on-chip systems required for quantum information processing." @default.
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- W3100118005 date "2019-07-31" @default.
- W3100118005 modified "2023-10-14" @default.
- W3100118005 title "Directional Emission of a Deterministically Fabricated Quantum Dot–Bragg Reflection Multimode Waveguide System" @default.
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- W3100118005 doi "https://doi.org/10.1021/acsphotonics.9b00369" @default.
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