The IoP colloquium of this month will be given by Prof. Andrea Cavalleri, who is the director of the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, and also a professor of physics at the 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.
References (added by Mark Golden):
- Photoinduced superconductivity: Nature Physics 14, 837 (2018); Nature 530, 461 (2016), Nature 516, 71 (2014); Nature Materials 13, 705 (2014); Phys. Rev. B89, 184516 (2014).
- Other stories: Nature 555, 79 (2018); Science 359, 575 (2018); Nature Physics 12, 1012 (2016); Nature Materials 14, 883 (2015).
For more information about the speaker: http://qcmd.mpsd.mpg.de/index.php/acavalleri.html
Hosts: Erik van Heumen and Mark Golden of IoP-WZI.
Drinks after the colloquium will be served at 'Academische Kwartier' in the main hall of building C.