UP1 Ultrafast nanooptics

• Ultrafast nanooptics
• Grating-coupling of surface plasmons onto metallic tips: A nanoconfined light source
• Spectroscopy of molecular nanostructures
• Localized multiphoton emission of femtosecond electron pulses from metal nanotips

UP2 Nonlinear terahertz and midinfrared spectroscopy

• Ultrafast high-field transport in GaAs
• Phase-resolved two-dimensional spectroscopy in the mid-infrared range
• Phase-resolved pump-probe experiments on a QCL
• Internal motions of a quasiparticle governing its ultrafast nonlinear response