Nonlinear response and ultrafast dynamics from superconducting thin flims and metamaterials

Recently, metamaterial in the terahertz (THz) region has become an attractive field as a novel approach to control and manipulate the electromagnetic waves. In this paper, we report our recent development of nonlinear response and ultrafast dynamics from superconducting metamaterials at THz region measured by intense THz pump THz probe system. Both low temperature and high temperature superconducting thin films were studied for comparison.