Laser Scanning Microscopy of Microwave Superconducting Lumped Element Resonators

17 03/2016

Thursday, 17 Mar. 2016, 15:00 - 16:00

Workgroup Aspelmeyer Group

Presenter: Junxin Chen; ETH Zurich, CH
Host: M. Aspelmeyer
Where: Schrödingerroom, 4th floor, Boltzmanngasse 5, 1090 Wien

When laser shines on a superconductor optical photons can break Cooper pairs into quasiparitcles and change resistance and kinetic inductance of the superconductor. This kind of photo-induced change is called photo response. Laser scanning microscopy (LSM) of superconductors is a measurement synchronizing photo response and spatial information of the laser beam. The principle of laser scanning microscopy has been, for instance, used to probe current density distribution in superconductors and build sensitive photon detectors. However, laser scanning microscopy has not been applied to lumped element resonators and superconducting circuits for quantum information purpose yet. The recent work in QuDev Lab at ETHZ shows the potential for LSM to become a powerful tool of quantum simulation.