Directional emission of a deterministically fabricated quantum dot - Bragg reflection multi-mode waveguide system

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 micro-photoluminescence 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 an oscillatory dependence of this contrast 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 $\beta$-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 non-reciprocal on-chip systems required for quantum information processing.

arXiv comment25 pages, 5 figures

References in corpus (26)

• The Quantum Internet
• Chiral Quantum Optics
• Interfacing single photons and single quantum dots with photonic nanostructures
• Near optimal single photon sources in the solid state
• Transverse and longitudinal angular momenta of light
• Triggered single photons from a quantum dot
• On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
• Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
• Deterministic photon-emitter coupling in chiral photonic circuits
• Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
• Controlled light-matter coupling for a single quantum dot embedded in a pillar microcavity using far-field optical lithography
• Nanoscale optical positioning of single quantum dots for bright and pure single-photon emission
• Enhanced photon-extraction efficiency from deterministic quantum-dot microlenses
• Chirality of nanophotonic waveguide with embedded quantum emitter for unidirectional spin transfer
• A heterogeneous III-V/silicon integration platform for on-chip quantum photonic circuits with single quantum dot devices
• High Purcell factor generation of coherent on-chip single photons
• A Waveguide-Coupled On-Chip Single Photon Source
• Size-Dependence of the Wavefunction of Self-Assembled Quantum Dots
• Direct observation of nanofabrication influence on the optical properties of single self-assembled InAs/GaAs quantum dots
• Deterministic integration of quantum dots into on-chip multi-mode interference beamsplitters using in-situ electron beam lithography
• In-situ electron-beam lithography of deterministic single-quantum-dot mesa-structures using low-temperature cathodoluminescence spectroscopy
• Engineering chiral light--matter interaction in photonic crystal waveguides with slow light
• Numerical optimization of the extraction efficiency of a quantum-dot based single-photon emitter into a single-mode fiber
• Quantum photonics hybrid integration platform
• Radiative cascades in charged quantum dots
• CSAR 62 as negative-tone resist for high-contrast e-beam lithography at temperatures between 4 K and room temperature

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• Position-dependent chiral coupling between single quantum dots and cross waveguides
• Directional control of weakly localized Raman from a random network of fractal nanowires
• Directional coupling of emitters into waveguides: A symmetry perspective
• Design and fabrication of ridge waveguide-based nanobeam cavities for on-chip single-photon sources
• Optimization of heterogeneously integrated InP-Si on-chip photonic components
• Quantum dots as optimized chiral emitters for photonic integrated circuits
• Directional single-photon emission from deterministic quantum dot waveguide structures