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

The present status and development of strong-field nano-optics, an emerging field of
nonlinear optics, is discussed. A nonperturbative regime of light-matter interactions is …

We present the development of the first ultrafast transmission electron microscope (UTEM)
driven by localized photoemission from a field emitter cathode. We describe the …

Free electron beams such as those employed in electron microscopes have evolved into
powerful tools to investigate photonic nanostructures with an unrivaled combination of …

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 …

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 …

The nonradiative lifetime (τ NR) of the near-band-edge emission in various quality GaN
samples is compared with the results of positron annihilation measurement, in order to …

We present an experimental and numerical study of electron emission from a sharp tungsten
tip triggered by sub-8-fs low-power laser pulses. This process is nonlinear in the laser …

Cathodoluminescence (CL) is a powerful tool for the investigation of optical properties of
materials. In recent years, its combination with scanning transmission electron microscopy …

We reveal substantial luminescence yield heterogeneity among individual subdiffraction
grains of high-performing methylammonium lead halide perovskite films by using high …