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Hybrid longitudinal-transverse phonon polaritons

Author

Listed:
  • Christopher R. Gubbin

    (University of Southampton)

  • Rodrigo Berte

    (Ministry of Education of Brazil
    Ludwig-Maximilians-Universität München)

  • Michael A. Meeker

    (U.S. Naval Research Laboratory)

  • Alexander J. Giles

    (U.S. Naval Research Laboratory)

  • Chase T. Ellis

    (U.S. Naval Research Laboratory)

  • Joseph G. Tischler

    (U.S. Naval Research Laboratory)

  • Virginia D. Wheeler

    (U.S. Naval Research Laboratory)

  • Stefan A. Maier

    (Ludwig-Maximilians-Universität München)

  • Joshua D. Caldwell

    (Vanderbilt University)

  • Simone De Liberato

    (University of Southampton)

Abstract

Phonon polaritons, hybrid light-matter quasiparticles resulting from strong coupling of the electromagnetic field with the lattice vibrations of polar crystals are a promising platform for mid-infrared photonics but for the moment there has been no proposal allowing for their electrical pumping. Electrical currents in fact mainly generate longitudinal optical phonons, while only transverse ones participate in the creation of phonon polaritons. We demonstrate how to exploit long-cell polytypes of silicon carbide to achieve strong coupling between transverse phonon polaritons and zone-folded longitudinal optical phonons. We develop a microscopic theory predicting the existence of the resulting hybrid longitudinal-transverse excitations. We then provide an experimental observation by tuning the resonance of a nanopillar array through the folded longitudinal optical mode, obtaining a clear spectral anti-crossing. The hybridisation of phonon polaritons with longitudinal phonons could represent an important step toward the development of phonon polariton-based electrically pumped mid-infrared emitters.

Suggested Citation

  • Christopher R. Gubbin & Rodrigo Berte & Michael A. Meeker & Alexander J. Giles & Chase T. Ellis & Joseph G. Tischler & Virginia D. Wheeler & Stefan A. Maier & Joshua D. Caldwell & Simone De Liberato, 2019. "Hybrid longitudinal-transverse phonon polaritons," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09414-4
    DOI: 10.1038/s41467-019-09414-4
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    Cited by:

    1. Buahom, Piyapong & Thongmongkol, Khanin & Alshrah, Mohammed & Gong, Pengjian & Park, Chul B., 2023. "Effects of cell anisotropy on conductive and radiative thermal transport in polymeric foam insulation," Energy, Elsevier, vol. 275(C).

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