THz-pump/THz probe experiments

Time-Resolved Optical Spectroscopy Optical spectroscopy is a versatile experimental tool for studying the long-wavelength behavior of condensed matter systems. The relevant measured quantity is the current-current correlation function, encoded in the complex dielectric function. When performed with ultrafast lasers, optical spectroscopy can reveal key features of the emergent electronic dynamics following a strong laser excitation. We are particularly interested in the low-energy dynamics of materials, roughly located in the midinfrared/THz region of the electromagnetic spectrum, and in the possibility of using strong THz pulses to manipulate electronic degrees of freedom in quantum materials. Our group has a vast expertise in using ultrafast light pulses to tailor material properties and we are strongly interested in developing THz-pump/THz probe experiments, as well as performing 2D THz spectroscopy. on quantum materials. In a THz pump-THz probe experiment, a sample is excited by the pump (red) and probed by a reflected or transmitted probe field (blue). The complex transient optical response is measured with phase sensitivity by THz electro-optic sampling (EOS) and as function of pump-probe (PP) delay. https://mitrano.physics.harvard.edu/research/techniques

EO crystals to study THz-driven quantum materials (Mott insulators, strongly correlated metals, and superconductors)
https://www.youtube.com/watch?v=nmkEny5QQ2Y