We review basic physics and novel types of optical angular momentum. We start with a
theoretical overview of momentum and angular momentum properties of generic optical …

Scientists have known for more than a century that light possesses both linear and angular
momenta along the direction of propagation. However, only recent advances in optics have …

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 …

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 …

Although a relatively new area of nanoscience, nonlinear plasmonics has become a fertile
ground for the development and testing of new ideas pertaining to light–matter interaction …

Recently many ideas have been proposed for the use of a longitudinal field for particle
acceleration, fluorescent imaging, second-harmonic generation and Raman spectroscopy. A …

We generate tightly focused optical vector beams whose electric fields spin around an axis
transverse to the beams' propagation direction. We experimentally investigate these fields …

The three-dimensional (3D) vectorial nature of electromagnetic waves of light has not only
played a fundamental role in science but also driven disruptive applications in optical …

Highly confined vectorial electromagnetic field distributions are an excellent tool for detailed
studies in nano-optics, such as nonlinear microscopy, advanced fluorescence imaging, or …

The structure of our material world is characterized by a large hierarchy of length scales that
determines material properties and functions. Increasing spatial resolution in optical imaging …