Independent electrical control of two quantum dots coupled through a photonic-crystal waveguide

Abstract

Efficient light-matter interaction at the single-photon level is of fundamental importance in emerging photonic quantum technology. A fundamental challenge is addressing multiple quantum emitters at once, as intrinsic inhomogeneities of solid-state platforms require individual tuning of each emitter. We present the realization of two semiconductor quantum dot emitters that are efficiently coupled to a photonic-crystal waveguide and individually controllable by applying a local electric Stark field. We present resonant transmission and fluorescence spectra in order to probe the coupling of the two emitters to the waveguide. We exploit the single-photon stream from one quantum dot to perform spectroscopy on the second quantum dot positioned 16$\mu$m away in the waveguide. Furthermore, power-dependent resonant transmission measurements reveals signatures of coherent coupling between the emitters. Our work provides a scalable route to realizing multi-emitter collective coupling, which has inherently been missing for solid-state deterministic photon emitters.

6 pages, 3 figures

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Cited by in corpus (5)

• Green's function approach to interacting lattice polaritons and optical nonlinearities in subwavelength arrays of quantum emitters
• Many-Body Entanglement in Solid-State Emitters
• Controlling coherence between waveguide-coupled quantum dots
• Reconfigurable quantum photonic circuits based on quantum dots
• Superbunching from coherently driven atoms in a waveguide