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

Phase engineering of nanomaterials (PEN) is an emerging field that aims to tailor the
physicochemical properties of nanomaterials by precisely manipulating their crystal phases …

The inelastic interaction between flying particles and optical nanocavities gives rise to
entangled states in which some excitations of the latter are paired with momentum changes …

Spectroscopies utilizing free electron beams as probes offer detailed information on the
reciprocal-space excitations of 2D materials such as graphene and transition metal …

Nonlocal effects have been shown to be responsible for a variety of nontrivial optical effects
in small-size plasmonic nanoparticles, beyond classical electrodynamics. However, it is not …

Advances in the ability to manipulate free-electron phase profiles within the electron
microscope have spurred development of quantum-mechanical descriptions of electron …

Quantum materials are usually heterogeneous, with structural defects, impurities, surfaces,
edges, interfaces, and disorder. These heterogeneities are sometimes viewed as liabilities …

Topological phases of matter arise in distinct fermionic and bosonic flavors. The
fundamental differences between them are encapsulated in their rotational symmetries—the …

The adiabatic approximation has formed the basis for much of our understandings of the
interaction of light and electrons. The classical nonrecoil approximation or quantum …

Exciton polaritons (EPs) are ubiquitous light-matter excitations under intense investigation
as test beds of fundamental physics and as components for all-optical computing. Owing to …