Surface plasmons (SPs) are electromagnetic surface waves that propagate at the interface
between a conductor and a dielectric. Due to their unique ability to concentrate light on two …

Light at optical frequencies interacting with a metal surface can excite interband quantum
transitions, or intraband currents at frequencies approaching the PHz range. Momentum …

We report a transient plasmonic spin skyrmion topological quasiparticle within surface
plasmon polariton vortices, which is described by analytical modeling and imaging of its …

Spin and field textures define the topology of the electric and magnetic fields in vacuum.
These textures can be imposed on matter by light–matter interactions on the nanometer …

Spatial modulation of electron beams is an essential tool for various applications such as
nanolithography and imaging, yet its conventional implementations are severely limited and …

Plasmonic vortices confining orbital angular momentums to surface have aroused wide
research interest in the last decade. Recent advances of near-field microscopes have …

Measuring the field of visible light with high spatial resolution has been challenging, as
many established methods only detect a focus-averaged signal. Here, we introduce a near …

The vector E× H and pseudoscalar E· H products of electric and magnetic fields are
separately finite in vacuum transverse electric and magnetic (TEM) plane waves, and …

The recently developed concept of optical skyrmions has introduced an exciting dimension
to the emerging field of Poincaré engineering in optical lattices. There remains an …

In this Letter we demonstrate the use of plasmonic focusing in conjunction with nonlinear
photoemission to develop geometrically flat nanoscale electron sources with less than 40 …