Efficient demultiplexed single-photon source with a quantum dot coupled to a nanophotonic waveguide

Abstract

Planar nanostructures allow near-ideal extraction of emission from a quantum emitter embedded within, thereby realizing deterministic single-photon sources. Such a source can be transformed into M single-photon sources by implementing active temporal-to-spatial mode demultiplexing. We report on the realization of such a demultiplexed source based on a quantum dot embedded in a nanophotonic waveguide. Efficient outcoupling (>60%) from the waveguide into a single mode optical fiber is obtained with high-efficiency grating couplers. As a proof-of-concept, active demultiplexing into M=4 spatial channels is demonstrated by the use of electro-optic modulators with an end-to-end efficiency of >81% into single-mode fibers. Overall we demonstrate four-photon coincidence rates of >1 Hz even under non-resonant excitation of the quantum dot. The main limitation of the current source is the residual population of other exciton transitions that corresponds to a finite preparation efficiency of the desired transition. We quantitatively extract a preparation efficiency of 15% using the second-order correlation function measurements. The experiment highlights the applicability of planar nanostructures as efficient multiphoton sources through temporal-to-spatial demultiplexing and lays out a clear path way of how to scale up towards demonstrating quantum advantages with the quantum dot sources.

5 pages, 3 figures

References in corpus (26)

• Review article: Linear optical quantum computing
• Interfacing single photons and single quantum dots with photonic nanostructures
• Characterizing Quantum Supremacy in Near-Term Devices
• On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
• Boson Sampling on a Photonic Chip
• Quantum Random Number Generators
• Photonic quantum information processing: a review
• Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
• Transform-limited single photons from a single quantum dot
• On the experimental verification of quantum complexity in linear optics
• Near Transform-Limited Single Photons from an Efficient Solid-State Quantum Emitter
• Active Temporal Multiplexing of Indistinguishable Heralded Single Photons
• Scalable boson-sampling with time-bin encoding using a loop-based architecture
• High speed self-testing quantum random number generation without detection loophole
• Exciton spin-flip rate in quantum dots determined by a modified local density of optical states
• Quantum optics with near lifetime-limited quantum-dot transitions in a nanophotonic waveguide
• Active demultiplexing of single-photons from a solid-state source
• What are single photons good for?
• Multiple time scale blinking in InAs quantum dot single-photon sources
• Nanomechanical single-photon routing
• High-Efficiency Shallow-Etched Grating on GaAs Membranes for Quantum Photonic Applications
• Optimal excitation conditions for indistinguishable photons from quantum dots
• Narrow optical linewidths and spin pumping on charge-tunable, close-to-surface self-assembled quantum dots in an ultra-thin diode
• Provable Quantum Advantage in Randomness Processing
• Multi-dimensional photonic states from a quantum dot
• High-efficiency single-photon generation via large-scale active time multiplexing

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