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Download Hi-Res ImageDownload to MS-PowerPointCite This:Nano Lett. 2019, 19, 10, 7287-7292
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Tuning Spontaneous Emission through Waveguide Cavity Effects in Semiconductor Nanowires

  • Florian Dirnberger
    Florian Dirnberger
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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    Orcidhttp://orcid.org/0000-0002-2932-2850
  • , 
  • Diego Abujetas
    Diego Abujetas
    Instituto de Estructura de la Materia (IEM-CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006 Madrid, Spain
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  • , 
  • Jan König
    Jan König
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Moritz Forsch
    Moritz Forsch
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Thomas Koller
    Thomas Koller
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Imke Gronwald
    Imke Gronwald
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Christoph Lange
    Christoph Lange
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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    Orcidhttp://orcid.org/0000-0002-2134-6612
  • , 
  • Rupert Huber
    Rupert Huber
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Christian Schüller
    Christian Schüller
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
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  • , 
  • Tobias Korn
    Tobias Korn
    Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
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    Orcidhttp://orcid.org/0000-0003-4808-391X
  • , 
  • José Sánchez-Gil
    José Sánchez-Gil
    Instituto de Estructura de la Materia (IEM-CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006 Madrid, Spain
    More by José Sánchez-Gil
    Orcidhttp://orcid.org/0000-0002-5370-3717
  • , and 
  • Dominique Bougeard*
    Dominique Bougeard
    Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany
    *E-mail: [email protected]
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    Orcidhttp://orcid.org/0000-0003-3793-2787
Cite this: Nano Lett. 2019, 19, 10, 7287–7292
Publication Date (Web):September 16, 2019
https://doi.org/10.1021/acs.nanolett.9b02883
Copyright © 2019 American Chemical Society
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    Abstract

    Abstract Image

    The ability to tailor waveguide cavities and couple them with quantum emitters has developed a realm of nanophotonics encompassing, for example, highly efficient single photon generation or the control of giant photon nonlinearities. Opening new grounds by pushing the interaction of the waveguide cavity and integrated emitters further into the deep subwavelength regime, however, has been complicated by nonradiative losses due to the increasing importance of surface defects when decreasing cavity dimensions. Here, we show efficient suppression of nonradiative recombination for thin waveguide cavities using core–shell semiconductor nanowires. We experimentally reveal the advantages of such nanowires, which host mobile emitters, that is, free excitons, in a one-dimensional (1D) waveguide, highlighting the resulting potential for tunable, active, nanophotonic devices. In our experiment, controlling the nanowire waveguide diameter tunes the luminescence lifetime of excitons in the nanowires across 2 orders of magnitude up to 80 ns. At the smallest wire diameters, we show that this luminescence lifetime can be manipulated by engineering the dielectric environment of the nanowires. Exploiting this unique handle on the spontaneous emission of mobile emitters, we demonstrate an all-dielectric spatial control of the mobile emitters along the axis of the 1D nanowire waveguide.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.nanolett.9b02883.

    • Estimation of optically excited carrier density, identification of crystal phase pure NWs in μPL spectroscopy, discussion of radiative and nonradiative recombination channels, details on analytic and numerical simulations, supplemental experimental data on the all-dielectric spatial control in NWs (PDF)

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    Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

    Cited By

    This article is cited by 3 publications.

    1. Viola Zeller, Nadine Mundigl, Paulo E. Faria Junior, Jaroslav Fabian, Christian Schüller, Dominique Bougeard. Wurtzite Quantum Wires with Strong Spatial Confinement: Polarization Anisotropies in Single-Wire Spectroscopy. Physical Review Applied 2022, 18 (5) https://doi.org/10.1103/PhysRevApplied.18.054014
    2. Sebastian Meier, Paulo E. Faria Junior, Ferdinand Haas, Emma-Sophia Heller, Florian Dirnberger, Viola Zeller, Tobias Korn, Jaroslav Fabian, Dominique Bougeard, Christian Schüller. Intersubband excitations in ultrathin core-shell nanowires in the one-dimensional quantum limit probed by resonant inelastic light scattering. Physical Review B 2021, 104 (23) https://doi.org/10.1103/PhysRevB.104.235307
    3. Florian Dirnberger, Jonas D. Ziegler, Paulo E. Faria Junior, Rezlind Bushati, Takashi Taniguchi, Kenji Watanabe, Jaroslav Fabian, Dominique Bougeard, Alexey Chernikov, Vinod M. Menon. Quasi-1D exciton channels in strain-engineered 2D materials. Science Advances 2021, 7 (44) https://doi.org/10.1126/sciadv.abj3066
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