Our research focuses on coherent and incoherent dynamics of the crystal lattice. By using nanostructured samples we generate and control specific excitations, that are probed by Ultrafast X-Ray Diffraction (UXRD). Typical experiments are studies of heat dynamics on the nanoscale, the generation of quasi-monochromatic phonon wavepackets and nonlinear propagation effects of coherent phonons. In future, we plan to extend our research activities towards low temperatures. This will enable us to study phase transitions in complex materials. Our research has lead to various potential technological applications, e.g. the switching of hard x-rays on picosecond timescales.