November 9, 2018 - 3:00pm
Photo-induced Superconductivity and other stories
Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
Department of Physics, University of Oxford
In this lecture, I will discuss how coherent electromagnetic radiation at infrared and TeraHertz frequencies can be used to drive coherently and to large amplitudes interesting collective excitations in solids. The nonlinear cooperative response of low-frequency excitations is largely unexplored and can yield new types functional control. I will for example discuss experiments in which superconducting fluctuations can be amplified by light at temperatures higher than the thermodynamic transition temperature. I will also discuss how X-ray Free Electron Lasers are integral to this work, and how they can be used to sample the dynamical evolution of crystal lattices and of other microscopic parameters in time.
Andrea Cavalleri is the founding director of the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg (Germany) and a professor of Physics at the University of Oxford (UK).
He is best known for his experiments in which intense TeraHertz pulses are used to drive large amplitude and coherent lattice distortions in solids, manipulating their functional properties, and for demonstrating that one can induce non-equilibrium superconductivity far above the thermodynamic transition temperature. Motivated by the need to probe driven lattices, he has also been majorly involved in the development of ultrafast X-ray techniques, since their inception in the late 1990s through their modern incarnation at X-ray Free Electron Lasers.
Cavalleri is a recipient of the 2004 European Science Foundation Young Investigator Award, of the 2015 Max Born Medal from the IoP and the DFG, of the 2015 Dannie Heineman Prize from the Academy of Sciences in Goettingen and of the 2018 Isakson Prize from the APS. He is a fellow of the APS, of the AAAS, and of the IoP. He is also an elected Member of the Academia Europaea and of the European Academy of Sciences.