In this presentation, the linear dynamics of ultrathin oxide films and oxide surfaces in the range from 1 to 50 THz upon electromagnetic excitation will be discussed. Surface vibrational spectroscopy based on high-resolution electron energy loss spectroscopy (HREELS) reveals the full dielectric characterization of the surface response of BaTiO$_3$, SrRuO$_3$, and SrTiO$_3$ with different...
The key challenge in a rapidly emerging field of modern spintronics consists in the push from the GHz to THz domain. In particular, it requires the development of techniques for the generation of femtosecond spin current (SC) pulses. With the help of magneto-induced second harmonic generation (mSHG) in the back pump-front probe scheme, we have demonstrated long-range spin transport on a...
Dimethylsulfoxide (DMSO) is a widespread aprotic solvent proposed for use in lithium-air batteries [1]. However, the individual steps of electron transfer from the cathode into the solvated oxygen remain unknown. Using a model system of DMSO films on Cu(111) we investigate the fundamental steps in electron transfer using time- and angle-resolved two-photon photoelectron spectroscopy. On an...
The dynamics of the surface photovoltage (SPV) at the interface of SiO$_2$ and Si has been a subject of interest over the last decades [1-4]. In this contribution, we present time-resolved photoelectron spectroscopy (tr-PES) measurements on SiO$_2$/Si interfaces using a high-order harmonic generation (HHG) light source at megahertz repetition rates [5]. The observed dynamics of SPV as well as...