ﻻ يوجد ملخص باللغة العربية
We study the effect of electron spill-out and of nonlocality on the propagation of light inside a gap between two semi-infinite metallic regions. We first present a simplified physical model for the spill-out phenomenon, an approach sufficient to show that the propagation of the gap-plasmon becomes impossible in the tunneling regime. However, in the limit of very small gaps, only a Quantum Hydrodynamic Theory (QHT) approach, taking into account both the electron spill-out and nonlocality, is able to accurately model the gap-plasmon characteristics and to correctly retrieve the refractive index of the bulk metal as the limit of the effective index of the gap-plasmon for vanishing gaps. Finally, we analyze the relation between different models and show that up to a certain size it is possible to predict the correct gap-plasmon effective index by considering a properly resized effective gap.
The relaxation of a quantum emitter (QE) near metal-dielectric layered nanostructures is investigated, with focus on the influence of plasmonic quantum effects. The Greens tensor approach, combined with the Feibelman $d$-parameter formalism, is used
Recent experiments have shown that spatial dispersion may have a conspicuous impact on the response of plasmonic structures. This suggests that in some cases the Drude model should be replaced by more advanced descriptions that take spatial dispersio
We report on the charge spill-out and work function of epitaxial few-layer graphene on 6H-SiC(0001). Experiments from high-resolution, energy-filtered X-ray photoelectron emission microscopy (XPEEM) are combined with ab initio Density Functional Theo
Enhancing magneto-optical effects is crucial for size reduction of key photonic devices based on non-reciprocal propagation of light and to enable active nanophotonics. We disclose a so far unexplored approach that exploits dark plasmons to produce a
We report $ab$ $initio$ band diagram and optical absorption spectra of hexagonal boron nitride ($h$-BN), focusing on unravelling how the completeness of basis set for $GW$ calculations and how electron-phonon interactions (EPIs) impact on them. The c