Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

Over a billion people across the world experience a high rate of missed disease diagnosis,
an issue that highlights the need for diagnostic tools showing increased accuracy and …

Cat states and Gottesman-Kitaev-Preskill (GKP) states play a key role in quantum
computation and communication with continuous variables. The creation of such states …

Chirality is a phenomenon with widespread relevance in fundamental physics, material
science, chemistry, optics, and spectroscopy. In this work, we show that a free electron can …

Spatiotemporal electron-beam sha** is a bold frontier of electron microscopy. Over the
past decade, sha** methods evolved from static phase plates to low-speed electrostatic …

Cherenkov radiation occurs only when a charged particle moves with a velocity exceeding
the phase velocity of light in that matter. This radiation mechanism creates directional light …

Recent theoretical and experimental breakthroughs have given rise to the emerging field of
free-electron quantum optics, resha** the understanding of free-electron physics …

Structural coloration generates colors by the interaction between incident light and micro-or
nano-scale structures. It has received tremendous interest for decades, due to advantages …

Bremsstrahlung—the spontaneous emission of broadband radiation from free electrons that
are deflected by atomic nuclei—contributes to the majority of X-rays emitted from X-ray tubes …

Spontaneous light emission is central to a vast range of physical systems and is a founding
pillar for the theory of light–matter interactions. In the presence of complex photonic media …