Welcome to the Lattice Dynamics group website!

Our group is interested in optical phonons in polar dielectric crystals and their heterostructures. We use various linear and nonlinear mid-infrared to THz spectroscopy techniques, employing the Infrared Free Electron Laser (IR-FEL) at the FHI as an intense and tunable light source.

Using this unique laser, we study various problems ranging from infrared nanophotonics to phase transitions in complex oxides. Check out our research page and our recent publications for more information!

We finally managed to take a group picture. From left to right: Sören, Richarda, Alex, Dory, Giulia. Unfortunately, this also constitutes the farewell for Sören. We will miss you dearly!

Richarda just had her very first paper published, our first publication from the new wide-field SFG microscope. Congratulations, Richarda!

Nikolai‘s and Giulia‘s paper on hyperbolic shear polaritons in gallium oxide just appeared in Nature. Congrats! Fantastic work.

Dorothée just joined the group as a new Ph.D. student for a joint project on phonon-driven switching of ferroic states together with the THz Structural Dynamics group and Andrei Kirilyuk‘s group at Radboud university. Her project is part of the newly established Max [more...]

Richarda just submitted our first paper on infrared super-resolution wide-field microscopy using sum-frequency generation. You can find the preprint on the arXiv. Congrats, Richarda!