63 citations · 139 across the 15 of their papers we have counts for
15 papers
Energy Absorption Interferometry
Stafford Withington, Willem Jellema
Energy Absorption Interferometry (EAI) is a technique for measuring the responsivities and complex-valued spatial polarimetric forms of the individual degrees of freedom through wh…
Superconducting NbN Resonator Parametric Amplifiers for Millimetre Wavelengths
Songyuan Zhao, Stafford Withington, Christopher Thomas
We report the development of a reactive sputtering process for high NbN films with high normal-state resistivity, tailored for kinetic inductance parametric amplifie…
Superconducting Ring Resonators: Modelling, Simulation, and Experimental Characterisation
Zhenyuan Sun, Stafford Withington, Christopher Thomas +1
We present a theoretical and experimental study of superconducting ring resonators as an initial step toward their implementation in superconducting electronics and quantum technol…
Non-degenerate pumping of superconducting resonator parametric amplifier with evidence of phase-sensitive amplification
Songyuan Zhao, Stafford Withington, Christopher Thomas
Superconducting resonator parametric amplifiers are potentially important components for a wide variety of fundamental physics experiments and utilitarian applications. We propose…
Determining Absolute Neutrino Mass using Quantum Technologies
A. A. S. Amad, F. F. Deppisch, M. Fleck +19
Next generation tritium decay experiments to determine the absolute neutrino mass require high-precision measurements of -decay electron energies close to the kinematic end poin…
Superconducting resonator parametric amplifiers with intrinsic separation of pump and signal tones
Songyuan Zhao, Stafford Withington, Christopher Niall Thomas
Superconducting resonator parametric amplifiers achieve ultra-low-noise amplification through the nonlinear kinetic inductance of thin-film superconductors. One of the main challen…
Superconducting Microwave Detector Technology for Ultra-Light Dark Matter Haloscopes and other Fundamental Physics Experiments: Device Physics (Part II)
David J. Goldie, Stafford Withington, Christopher N. Thomas
We consider and compare candidate superconducting detector technologies that might be applied to the readout of cavity-axion haloscopes and similar fundamental physics experiments.…
Superconducting Microwave Detector Technology for Ultra-Light Dark Matter Haloscopes and other Fundamental Physics Experiments: Background Theory (Part I)
Christopher N. Thomas, Stafford Withington, David J. Goldie
We consider how superconducting microwave detector technology might be applied to the readout of cavity-axion haloscopes and similar fundamental physics experiments. Expressions fo…
Quantum Noise Limited Phased Arrays for Single-Electron Cyclotron Radiation Emission Spectroscopy
Stafford Withington, Christopher Thomas, Songyuan Zhao
Neutrino oscillation experiments show that neutrinos have mass; however, the absolute mass scale is exceedingly difficult to measure and is currently unknown. A promising approach…
Nonlinear Properties of Supercurrent-Carrying Single and Multi-Layer Thin-Film Superconductors
Songyuan Zhao, Stafford Withington, David J. Goldie +1
Superconducting thin-films are central to the operation of many kinds of quantum sensors and quantum computing devices: Kinetic Inductance Detectors (KIDs), Travelling-Wave Paramet…
Nonequilibrium superconducting thin films with sub-gap and pair-breaking photon illumination
Tejas Guruswamy, David J. Goldie, Stafford Withington
We calculate nonequilibrium quasiparticle and phonon distributions for a number of widely-used low transition temperature thin-film superconductors under constant, uniform illumina…
Electrothermal Model of Kinetic Inductance Detectors
Christopher N Thomas, Stafford Withington, David J Goldie
An electrothermal model of Kinetic Inductance Detectors (KIDs) is described. The non-equilibrium state of the resonator's quasiparticle system is characterized by an effective temp…
Development of a NbN Deposition Process for Superconducting Quantum Sensors
D. M. Glowacka, D. J. Goldie, S. Withington +3
We have carried out a detailed programme to explore the superconducting characteristics of reactive DC-magnetron sputtered NbN. The basic principle is to ignite a plasma using argo…
Development of a NbN Deposition Process for Superconducting Quantum Sensors
D. M. Glowacka, D. J. Goldie, S. Withington +2
We have carried out a detailed programme to explore the superconducting characteristics of reactive DC-magnetron sputtered NbN. The basic principle is to ignite a plasma using argo…
Quasiparticle generation efficiency in superconducting thin-films
T. Guruswamy, D. J. Goldie, S. Withington
Thin-film superconductors with thickness 30 to 500 nm are used as non-equilibrium quantum detectors for photons, phonons or more exotic particles. One of the most basic questions i…