A density-functional formalism comparable to the theory of Hohenberg, Kohn and Sham is
developed for electronic systems subject to time-dependent external fields. The formalism …

Plasmonics is a rapidly growing field spanning research and applications across chemistry,
physics, optics, energy harvesting, and medicine. Ultrafast photoemission electron …

Collective electronic excitations at metal surfaces are well known to play a key role in a wide
spectrum of science, ranging from physics and materials science to biology. Here we focus …

Writing a textbook is an undertaking that requires strong motivation, strong enough to carry
out almost two years of solid work in this case. My motivation arose from three sources. The …

The recently observed blueshift of the surface plasmon of Ag with increasing parallel
momentum and of the Mie resonance of small Ag particles with decreasing radius are …

Plasmon–emitter interactions are of central importance in modern nanoplasmonics and are
generally maximal at short emitter–surface separations. However, when the separation falls …

Photodepletion spectroscopy is used to measure the optical activity of sputtered Ag ionic
clusters with up to 70 atoms. With decreasing cluster size the giant resonance caused by …

The classical treatment of plasmonics is insufficient at the nanometer-scale due to quantum
mechanical surface phenomena. Here, an extension of the classical paradigm is reported …

Clusters as mesoscopic particles represent an intermediate state of matter between single
atoms and solid material. The tendency to miniaturise technical objects requires knowledge …

We present an implementation of the linear density response function within the projector-
augmented wave method with applications to the linear optical and dielectric properties of …