Microwave Response of Vortices in Superconducting Resonators with High Kinetic Inductance

Magnetic flux vortices driven by microwave currents are an important loss mechanism in superconducting resonators and qubits. High kinetic inductance superconductors are important for a variety of detector technologies that require large inductances in a compact form factor. Prior work has focused on the behavior of vortices trapped in aluminum thin films. Here we present measurements of vortices trapped in coplanar waveguide resonators fabricated from superconducting thin films with a large amount of kinetic inductance, including TiN and NbTiN. Field cooling of multiple resonators with different parameters is used to study the magnetic field, frequency, and temperature dependence of the microwave vortex response.