Electro-optic routing of photons from single quantum dots in photonic integrated circuits

Abstract

Recent breakthroughs in solid-state photonic quantum technologies enable generating and detecting single photons with near-unity efficiency as required for a range of photonic quantum technologies. The lack of methods to simultaneously generate and control photons within the same chip, however, has formed a main obstacle to achieving efficient multi-qubit gates and to harness the advantages of chip-scale quantum photonics. Here we propose and demonstrate an integrated voltage-controlled phase shifter based on the electro-optic effect in suspended photonic waveguides with embedded quantum emitters. The phase control allows building a compact Mach-Zehnder interferometer with two orthogonal arms, taking advantage of the anisotropic electro-optic response in gallium arsenide. Photons emitted by single self-assembled quantum dots can be actively routed into the two outputs of the interferometer. These results, together with the observed sub-microsecond response time, constitute a significant step towards chip-scale single-photon-source de-multiplexing, fiber-loop boson sampling, and linear optical quantum computing.

arXiv comment7 pages, 4 figues + supplementary information

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Cited by in corpus (12)

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• Nonlinear integrated quantum electro-optic circuits
• Purcell enhanced and indistinguishable single-photon generation from quantum dots coupled to on-chip integrated ring resonators
• Near-unity indistinguishability single photon source for large-scale integrated quantum optics
• High-Efficiency Shallow-Etched Grating on GaAs Membranes for Quantum Photonic Applications
• On-chip generation and dynamic piezo-optomechanical rotation of single photons
• Coherent optical control of a quantum-dot spin-qubit in a waveguide-based spin-photon interface
• A silicon photonic add-drop filter for quantum emitters
• Electroabsorption in gated GaAs nanophotonic waveguides
• Criteria for single photon sources with variable nonclassicality threshold
• Reconfigurable quantum photonic circuits based on quantum dots
• Engineering cm-scale true push-pull electro-optic modulators in a suspended GaAs photonic integrated circuit platform by exploiting the orientation induced asymmetry of the Pockels $r_{41}$ coefficient