Autor segons l'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;
Departament: Química Física i Inorgànica
Autor/s de la URV: Alvarez Puebla, Ramon Angel / Pazos Pérez, Nicolás Carlos
Paraules clau: 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
Resum: 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.
Àrees temàtiques: Optics Electronic, optical and magnetic materials Ciência da computação Atomic and molecular physics, and optics
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: ramon.alvarez@urv.cat nicolas.pazos@urv.cat
Identificador de l'autor: 0000-0003-4770-5756 0000-0002-2326-4231
Data d'alta del registre: 2024-07-27
Volum de revista: 10
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.nature.com/articles/s41377-021-00511-y
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Light-Science & Applications. 10 (1):
Referència 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 de l'article: 10.1038/s41377-021-00511-y
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2021
Tipus de publicació: Journal Publications
Repositori URV