Terahertz spectroscopy of semiconductor nanostructures with a free-electron laser

In this talk I will present our recent experimental investigations on carrier dynamics in graphene studied via nonlinear laser spectroscopy, on time-resolved photoluminescence dynamics of single InAs/GaAs quantum dots under pulsed inter-sublevel excitation, and on sub-diffraction limited terahertz imaging by a GaAs-based superlens studied by scattering near-field optical microscopy. The experiments have been carried out using the mid-infrared/terahertz free-electron laser facility FELBE in Dresden, Germany.