Multi-dimensional THz-spectroscopies of correlated systems

Unlike conventional spectroscopy, which usually measures responses based on a single variable like frequency or time, multidimensional spectroscopy captures interactions across multiple domains, such as frequency, time, and spatial dimensions. This approach provides a more detailed and comprehensive analysis of a system’s properties. In our lab, we focus on understanding strongly correlated condensed matter systems. To achieve this, we develop innovative multidimensional spectroscopy techniques in the terahertz (THz) frequency range, which is particularly well-suited for studying the collective phenomena we are most interested in.

Schematic illustration of a particular experiment: 2D-THz pump/near-IR optical Kerr effect probe used for understanding THz-scale dynamics in solids.
General layout of a 2D-THz setup. Here solid red lines indicate the paths of near-infrared (800nm) beams that are used both for generating intense THz radiation (orange) and for probing it via “electro-optic sampling”.
THz-generating part of the setup (pair section between “Grating” and LN in the setup sketch above )