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Emission enhancement of erbium in a reverse nanofocusing waveguide

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  • Nicholas A. Güsken

    (Imperial College London
    Stanford University)

  • Ming Fu

    (Imperial College London)

  • Maximilian Zapf

    (Friedrich-Schiller-Universität Jena)

  • Michael P. Nielsen

    (Imperial College London
    UNSW Sydney)

  • Paul Dichtl

    (Imperial College London)

  • Robert Röder

    (Friedrich-Schiller-Universität Jena)

  • Alex S. Clark

    (Imperial College London
    University of Bristol)

  • Stefan A. Maier

    (Imperial College London
    Monash University School of Physics and Astronomy)

  • Carsten Ronning

    (Friedrich-Schiller-Universität Jena)

  • Rupert F. Oulton

    (Imperial College London)

Abstract

Since Purcell’s seminal report 75 years ago, electromagnetic resonators have been used to control light-matter interactions to make brighter radiation sources and unleash unprecedented control over quantum states of light and matter. Indeed, optical resonators such as microcavities and plasmonic antennas offer excellent control but only over a limited spectral range. Strategies to mutually tune and match emission and resonator frequency are often required, which is intricate and precludes the possibility of enhancing multiple transitions simultaneously. In this letter, we report a strong radiative emission rate enhancement of Er3+-ions across the telecommunications C-band in a single plasmonic waveguide based on the Purcell effect. Our gap waveguide uses a reverse nanofocusing approach to efficiently enhance, extract and guide emission from the nanoscale to a photonic waveguide while keeping plasmonic losses at a minimum. Remarkably, the large and broadband Purcell enhancement allows us to resolve Stark-split electric dipole transitions, which are typically only observed under cryogenic conditions. Simultaneous radiative emission enhancement of multiple quantum states is of great interest for photonic quantum networks and on-chip data communications.

Suggested Citation

  • Nicholas A. Güsken & Ming Fu & Maximilian Zapf & Michael P. Nielsen & Paul Dichtl & Robert Röder & Alex S. Clark & Stefan A. Maier & Carsten Ronning & Rupert F. Oulton, 2023. "Emission enhancement of erbium in a reverse nanofocusing waveguide," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38262-6
    DOI: 10.1038/s41467-023-38262-6
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    References listed on IDEAS

    as
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