Ultrathin dielectric gaps between metals can trap plasmonic optical modes with surprisingly
low loss and with volumes below 1 nm3. We review the origin and subtle properties of these …

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 …

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 …

When two metal nanostructures are placed nanometres apart, their optically driven free
electrons couple electrically across the gap. The resulting plasmons have enhanced optical …

This review provides a broad overview of the studies and effects of nonlocal response in
metallic nanostructures. In particular, we thoroughly present the nonlocal hydrodynamic …

Metallic structures with nanogap features have proven highly effective as building blocks for
plasmonic systems, as they can provide a wide tuning range of operating frequencies and …

Electromagnetic field localization in nanoantennas is one of the leitmotivs that drives the
development of plasmonics. The near-fields in these plasmonic nanoantennas are …

Quantum tunneling between two plasmonic resonators links non-linear quantum optics with
terahertz nanoelectronics. Direct observation of and control over quantum plasmon …

Plasmonic nanostructures enable light to be concentrated into nanoscale 'hotspots', wherein
the intensity of light can be enhanced by orders of magnitude. This plasmonic enhancement …

The plasmon resonances of two closely spaced metallic particles have enabled applications
including single-molecule sensing and spectroscopy, novel nanoantennas, molecular rulers …