Autor según el artículo: 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;

Departamento: Química Física i Inorgànica

Autor/es de la URV: Alvarez Puebla, Ramon Angel / Pazos Pérez, Nicolás Carlos

Palabras clave: 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

Resumen: 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.

Áreas temáticas: Optics Electronic, optical and magnetic materials Ciência da computação Atomic and molecular physics, and optics

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

Direcció de correo del autor: ramon.alvarez@urv.cat nicolas.pazos@urv.cat

Identificador del autor: 0000-0003-4770-5756 0000-0002-2326-4231

Fecha de alta del registro: 2023-02-23

Volumen de revista: 10

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.nature.com/articles/s41377-021-00511-y

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Light-Science & Applications. 10 (1):

Referencia de l'ítem segons les normes 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

DOI del artículo: 10.1038/s41377-021-00511-y

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2021

Tipo de publicación: Journal Publications