Progress in electron-beam spectroscopies has recently enabled the study of optical
excitations with combined space, energy and time resolution in the nanometre …

When light interacts with a metal nanoparticle (NP), its conduction electrons can be driven
by the incident electric field in collective oscillations known as localized surface plasmon …

Plasmons in doped graphene exhibit relatively large confinement and long lifetime
compared to noble-metal plasmons. Here, we study the propagation properties of plasmons …

This review discusses how low-energy valence excitations created by swift electrons can
render information on the optical response of structured materials with unmatched spatial …

Free-electron beams are versatile probes of microscopic structure and composition,, and
have revolutionized atomic-scale imaging in several fields, from solid-state physics to …

Surface plasmon polaritons can confine electromagnetic fields in subwavelength spaces
and are of interest for photonics, optical data storage devices and biosensing applications …

Nanowires supporting propagating surface plasmons can function as nanowaveguides to
realize the light guiding with field confinement beyond the diffraction limit, providing …

Metallic nanostructures now play an important role in many applications. In particular, for the
emerging fields of plasmonics and nanophotonics, the ability to engineer metals on …

We push the fabrication limit of gold nanostructures to the exciting sub-nanometer regime, in
which light–matter interactions have been anticipated to be strongly affected by the quantum …

When im**ing on optical structures or passing in their vicinity, free electrons can
spontaneously emit electromagnetic radiation, a phenomenon generally known as …