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A generalized non-local optical response theory for plasmonic nanostructures

Author

Listed:
  • N. A. Mortensen

    (Technical University of Denmark
    Center for Nanostructured Graphene (CNG), Technical University of Denmark)

  • S. Raza

    (Technical University of Denmark
    Center for Electron Nanoscopy, Technical University of Denmark)

  • M. Wubs

    (Technical University of Denmark
    Center for Nanostructured Graphene (CNG), Technical University of Denmark)

  • T. Søndergaard

    (Aalborg University)

  • S. I. Bozhevolnyi

    (University of Southern Denmark)

Abstract

Metallic nanostructures exhibit a multitude of optical resonances associated with localized surface plasmon excitations. Recent observations of plasmonic phenomena at the sub-nanometre to atomic scale have stimulated the development of various sophisticated theoretical approaches for their description. Here instead we present a comparatively simple semiclassical generalized non-local optical response theory that unifies quantum pressure convection effects and induced charge diffusion kinetics, with a concomitant complex-valued generalized non-local optical response parameter. Our theory explains surprisingly well both the frequency shifts and size-dependent damping in individual metallic nanoparticles as well as the observed broadening of the crossover regime from bonding-dipole plasmons to charge-transfer plasmons in metal nanoparticle dimers, thus unravelling a classical broadening mechanism that even dominates the widely anticipated short circuiting by quantum tunnelling. We anticipate that our theory can be successfully applied in plasmonics to a wide class of conducting media, including doped semiconductors and low-dimensional materials such as graphene.

Suggested Citation

  • N. A. Mortensen & S. Raza & M. Wubs & T. Søndergaard & S. I. Bozhevolnyi, 2014. "A generalized non-local optical response theory for plasmonic nanostructures," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4809
    DOI: 10.1038/ncomms4809
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    Cited by:

    1. Marcus Albrechtsen & Babak Vosoughi Lahijani & Rasmus Ellebæk Christiansen & Vy Thi Hoang Nguyen & Laura Nevenka Casses & Søren Engelberth Hansen & Nicolas Stenger & Ole Sigmund & Henri Jansen & Jespe, 2022. "Nanometer-scale photon confinement in topology-optimized dielectric cavities," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Li, Kun & Huang, Ting-Zhu & Li, Liang & Lanteri, Stéphane, 2019. "A reduced-order discontinuous Galerkin method based on a Krylov subspace technique in nanophotonics," Applied Mathematics and Computation, Elsevier, vol. 358(C), pages 128-145.
    3. Hu, Yahong & Zhu, Quanyong, 2017. "New analytic solutions of two-dimensional nonlocal nonlinear media," Applied Mathematics and Computation, Elsevier, vol. 305(C), pages 53-61.
    4. Ian Aupiais & Romain Grasset & Tingwen Guo & Dmitri Daineka & Javier Briatico & Sarah Houver & Luca Perfetti & Jean-Paul Hugonin & Jean-Jacques Greffet & Yannis Laplace, 2023. "Ultrasmall and tunable TeraHertz surface plasmon cavities at the ultimate plasmonic limit," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    5. Sergejs Boroviks & Zhan-Hong Lin & Vladimir A. Zenin & Mario Ziegler & Andrea Dellith & P. A. D. Gonçalves & Christian Wolff & Sergey I. Bozhevolnyi & Jer-Shing Huang & N. Asger Mortensen, 2022. "Extremely confined gap plasmon modes: when nonlocality matters," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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