Articles producció científica> Química Física i Inorgànica

Spontaneous and stimulated electron-photon interactions in nanoscale plasmonic near fields

  • Identification data

    Identifier: imarina:9207260
    Authors:
    Liebtrau, MatthiasSivis, MuratFeist, ArminLourenco-Martins, HugoPazos-Perez, NicolasAlvarez-Puebla, Ramon A.Garcia de Abajo, F. JavierPolman, AlbertRopers, Claus
    Abstract:
    The interplay between free electrons, light, and matter offers unique prospects for space, time, and energy resolved optical material characterization, structured light generation, and quantum information processing. Here, we study the nanoscale features of spontaneous and stimulated electron-photon interactions mediated by localized surface plasmon resonances at the tips of a gold nanostar using electron energy-loss spectroscopy (EELS), cathodoluminescence spectroscopy (CL), and photon-induced near-field electron microscopy (PINEM). Supported by numerical electromagnetic boundary-element method (BEM) calculations, we show that the different coupling mechanisms probed by EELS, CL, and PINEM feature the same spatial dependence on the electric field distribution of the tip modes. However, the electron-photon interaction strength is found to vary with the incident electron velocity, as determined by the spatial Fourier transform of the electric near-field component parallel to the electron trajectory. For the tightly confined plasmonic tip resonances, our calculations suggest an optimum coupling velocity at electron energies as low as a few keV. Our results are discussed in the context of more complex geometries supporting multiple modes with spatial and spectral overlap. We provide fundamental insights into spontaneous and stimulated electron-light-matter interactions with key implications for research on (quantum) coherent optical phenomena at the nanoscale.
  • Others:

    Author, as appears in the article.: Liebtrau, Matthias; Sivis, Murat; Feist, Armin; Lourenco-Martins, Hugo; Pazos-Perez, Nicolas; Alvarez-Puebla, Ramon A.; Garcia de Abajo, F. Javier; Polman, Albert; Ropers, Claus;
    Department: Química Física i Inorgànica
    URV's Author/s: Alvarez Puebla, Ramon Angel / Pazos Pérez, Nicolás Carlos
    Keywords: Surface plasmon resonance Spatial fourier transform Sailing vessels Quantum-information processing Plasmons Photons Numerical methods Nanotechnology Material characterizations Localized surface plasmon resonance Light-matter interactions Gold metallography Energy dissipation Electrons Electron trajectories Electron scattering Electron energy loss spectroscopy Electron emission Electric fields Electric field distributions Dissociation Cathodoluminescence spectroscopy Boundary element method
    Abstract: The interplay between free electrons, light, and matter offers unique prospects for space, time, and energy resolved optical material characterization, structured light generation, and quantum information processing. Here, we study the nanoscale features of spontaneous and stimulated electron-photon interactions mediated by localized surface plasmon resonances at the tips of a gold nanostar using electron energy-loss spectroscopy (EELS), cathodoluminescence spectroscopy (CL), and photon-induced near-field electron microscopy (PINEM). Supported by numerical electromagnetic boundary-element method (BEM) calculations, we show that the different coupling mechanisms probed by EELS, CL, and PINEM feature the same spatial dependence on the electric field distribution of the tip modes. However, the electron-photon interaction strength is found to vary with the incident electron velocity, as determined by the spatial Fourier transform of the electric near-field component parallel to the electron trajectory. For the tightly confined plasmonic tip resonances, our calculations suggest an optimum coupling velocity at electron energies as low as a few keV. Our results are discussed in the context of more complex geometries supporting multiple modes with spatial and spectral overlap. We provide fundamental insights into spontaneous and stimulated electron-light-matter interactions with key implications for research on (quantum) coherent optical phenomena at the nanoscale.
    Thematic Areas: Optics Electronic, optical and magnetic materials Ciência da computação Atomic and molecular physics, and optics
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: ramon.alvarez@urv.cat nicolas.pazos@urv.cat
    Author identifier: 0000-0003-4770-5756 0000-0002-2326-4231
    Record's date: 2024-07-27
    Journal volume: 10
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.nature.com/articles/s41377-021-00511-y
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Light-Science & Applications. 10 (1):
    APA: Liebtrau, Matthias; Sivis, Murat; Feist, Armin; Lourenco-Martins, Hugo; Pazos-Perez, Nicolas; Alvarez-Puebla, Ramon A.; Garcia de Abajo, F. Javier; Po (2021). Spontaneous and stimulated electron-photon interactions in nanoscale plasmonic near fields. Light-Science & Applications, 10(1), -. DOI: 10.1038/s41377-021-00511-y
    Article's DOI: 10.1038/s41377-021-00511-y
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2021
    Publication Type: Journal Publications
  • Keywords:

    Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Optics
    Surface plasmon resonance
    Spatial fourier transform
    Sailing vessels
    Quantum-information processing
    Plasmons
    Photons
    Numerical methods
    Nanotechnology
    Material characterizations
    Localized surface plasmon resonance
    Light-matter interactions
    Gold metallography
    Energy dissipation
    Electrons
    Electron trajectories
    Electron scattering
    Electron energy loss spectroscopy
    Electron emission
    Electric fields
    Electric field distributions
    Dissociation
    Cathodoluminescence spectroscopy
    Boundary element method
    Optics
    Electronic, optical and magnetic materials
    Ciência da computação
    Atomic and molecular physics, and optics
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