Hot Electron Generation through Near-Field Excitation of Plasmonic Nanoresonators
Idioma
en
Article de revue
Este ítem está publicado en
ACS photonics. 2021-03-16, vol. 8, n° 4, p. 1243-1250
American Chemical Society
Resumen en inglés
We theoretically study hot electron generation through the emission of a dipole source coupled to a nanoresonator on a metal surface. In our hybrid approach, we solve the time-harmonic Maxwell's equations numerically and ...Leer más >
We theoretically study hot electron generation through the emission of a dipole source coupled to a nanoresonator on a metal surface. In our hybrid approach, we solve the time-harmonic Maxwell's equations numerically and apply a quantum model to predict the efficiency of hot electron generation. Strongly confined electromagnetic fields and the strong enhancement of hot electron generation at the metal surface are predicted and are further interpreted with the theory of quasinormal modes. In the investigated nanoresonator setup, both the emitting source and the acceptor resonator are localized in the same volume, and this configuration looks promising to achieve high efficiencies of hot electron generation. By comparing with the efficiency calculated in the absence of the plasmonic nanoresonator, that is, the dipole source is located near a flat, unstructured metal surface, we show that the effective excitation of the modes of the nanoresonator boosts the generation efficiency of energetic charge carriers. The proposed scheme can be used in tip-based spectroscopies and other optoelectronic applications.< Leer menos
Palabras clave en inglés
Metrics & More Article Recommendations hot electron generation
localized light source
near-field excitation
plasmonic nanoresonators
Metrics & More Article Recommendations hot electron generation
Orígen
Importado de HalCentros de investigación