Event Details

3D superconducting parametric amplifiers

Modern parametric amplifiers are based on lithographically-produced superconducting thin-film planar transmission line structures. These parametric amplifiers rely on resonant structures with non-linear elements within them to stimulate intermodulation with a stronger pump tone that gives rise to signal gain when certain conditions are satisfied. Such parametric amplifiers have not yet been realised in superconducting 3D resonators. Possible applications of such devices include detector systems that are based in 3D waveguide such as dark matter detectors and quantum computers. Results from a 30 GHz series circular waveguide resonator made with bulk niobium are discussed. We find parametric gain of the order of 3 dB in a 5 MHz bandwidth of a signal at -60 dBm with a pump tone at -45 dBm positioned 10 kHz above the signal.