Scanning transmission electron microscopy (STEM) has emerged as a uniquely powerful
tool for structural and functional imaging of materials on the atomic level. Driven by …

Exploiting a particular wave property for a particular application necessitates components
capable of discriminating in the basis of that property. While spectral or polarisation …

In this paper, ultra-thin metalenses are proposed to generate converging and non-diffractive
vortex beam carrying orbital angular momentum (OAM) in microwave region. Phase …

Orbital angular momentum (OAM) detection underpins almost all aspects of vortex beams'
advances such as communication and quantum analogy. Conventional schemes are …

Understanding microscopic processes in materials and devices that can be switched by light
requires experimental access to dynamics on nanometer length and femtosecond time …

Vortex-carrying matter waves, such as chiral electron beams, are of significant interest in
both applied and fundamental science. Continuous-wave electron vortex beams are …

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

We present a method to efficiently multiply or divide the orbital angular momentum (OAM) of
light beams using a sequence of two optical elements. The key element is represented by an …

We present a 48-element programmable phase plate for coherent electron waves produced
by a combination of photolithography and focused ion beam. This brings the highly …

Temporally sha** the density of electron beams using light forms the basis for a wide
range of established and emerging technologies, including free-electron lasers and …