Non-equilibrium physics for quantum technology : THz lasing, photon nonlinearites and photo-induced phases of matter

by Dr Marios H. Michael (MPI for the Structure and Dynamic of Matter)

Tuesday 28 Nov 2023, 11:00 → 12:00 Europe/Zurich

WHGA/121

In this talk, I will give a summary of what I have been working on over the past few years. First, I will focus on how pumping strongly correlated materials can lead to photonic time crystals and their properties, emphasizing potential technological applications. Collective modes excited with THz pumping lead to oscillations long after the pump pulse has left the system. These oscillations create a time-periodic system that we call photonic time crystal. I will provide experimental examples illustrating these observations, focusing on my work with excitonic insulator candidate Ta2NiSe5 and high Tc cuprate YBa2Cu3O7−δ and discuss signatures in reflectivity and second harmonic generation. In the second part of the talk, I will discuss how light can be used to induce superconductivity.