Planar Superconducting Microwave Resonators

Coplanar wave guide (CPW) devices can be described as major part of contemporary telecommunication systems and devices, with a variety of applications such as couplers, band pass filters, oscillators, frequency meters and tuned amplifiers. Beside the conventional applications, many experiments based on Planar Superconducting Microwave Resonator structures (a particular class of CPW devices with superconducting parts) have been performed in recent years, for instance, non-conventional electron spin resonance experiments, circuit quantum electrodynamics, quantum information processing, coupling superconducting devices to magnetically trapped atoms or studying disorder in thin film superconductors, just to name a few. In order to overcome some of the technical drawbacks of the newly proposed non-conventional electron spin resonance experiments, we studied the properties of planar superconducting microwave resonators in a parallel applied magnetic field. Furthermore, patterning the resonator with antidots using a technique based on self-assembled polystyrene microspheres has been applied as the approach to suppress the Abrikosov-associated energy losses, which are known to be the cause of these technical drawbacks. Additionally, the magnetic hysteresis of such resonators in parallel applied magnetic fields up to 600 mT was surveyed.