Independent operation of two waveguide-integrated quantum emitters

Abstract

We demonstrate the resonant excitation of two quantum dots in a photonic integrated circuit for on-chip single-photon generation in multiple spatial modes. The two quantum dots are electrically tuned to the same emission wavelength using a pair of isolated $p$-$i$-$n$ junctions and excited by a resonant pump laser via dual-mode waveguides. We demonstrate two-photon quantum interference visibility of $(79\pm 2)\%$ under continuous-wave excitation of narrow-linewidth quantum dots. Our work solves an outstanding challenge in quantum photonics by realizing the key enabling functionality of how to scale-up deterministic single-photon sources.

7 pages 3 figures, Supplementary materials 7 pages 9 figures

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• Deterministic generation of arbitrary n-photon states in an integrated photonic system
• Hardware requirements for realizing a quantum advantage with deterministic single-photon sources
• Scalable construction of hybrid quantum photonic cavities
• Many-Body Entanglement in Solid-State Emitters
• Reconfigurable quantum photonic circuits based on quantum dots
• Heralded optical entanglement distribution via lossy quantum channels: A comparative study
• Superbunching from coherently driven atoms in a waveguide