Research topics of current projects

Electronic Excitations at Surfaces and Interfaces

Absorption of light by matter goes along with the excitation of charge carriers. The decay of these excitations critically determines the rate at which light energy is finally transferred to the rest of the solid. Understanding carrier relaxation is, therefore, of major relevance for processes such as light harvesting in solar cells, photochemical reactions at surfaces or laser assisted machining of solids. More...

Nonequilibrium Dynamics in Correlated Materials

In recent years, time-resolved spectroscopies have provided novel insights into the transient behavior of ordered phases, in which correlation effects play a prominent role. In these types of experiments, an intense and ultrashort laser pulse excites the electronic system far out of equilibrium. A second pulse probes the subsequent response of the system, as determined by the coupling between charge, spin and lattice. Non-equilibrium phenomena that are observed in these experiments include the generation of coherent phonons, the non-thermal destruction of charge-ordered states and the ultrafast quenching of magnetism.  More...

Ultrafast Plasmonics

The unique properties of localized surface plasmons (LSPs) and propagating surface plasmon polaritons (SPPs) permitting sub-wavelength confinement, light velocity propagation and highly localized sensing are the key features for combining broadband optics and nanoscale electronics. As a vision for potential applications plasmon-based devices could be utilized in future generation on-chip communication and signal processing. Due to these prospects broadband plasmonic excitations and their interaction with nanoscale systems have attracted considerable interest in recent years.  More...