High-harmonic spectroscopy of quantum materials

High-order harmonic generation (HHG) is a nonlinear optical phenomena that has led to generation of attosecond pulses as well as to spectroscopic probing of the source material. So far HHG has been used extensively in atomic and molecular systems in the gas phase. In this talk, I will discuss our initiatives in extending these capabilities to solid-state materials such as 2D crystals, heterostructures, and three-dimensional topological insulators. Our recent results show that HHG can be developed as a novel all-optical probe for the structure and dynamics including correlated dynamics in quantum materials.