366 citations · 1.7k across the 32 of their papers we have counts for
7 papers · 1 filter
A titanium-nitride near-infrared kinetic inductance photon-counting detector and its anomalous electrodynamics
J. Gao, M. R. Visser, M. O. Sandberg +10
We demonstrate single-photon counting at 1550 nm with titanium-nitride (TiN) microwave kinetic inductance detectors. Energy resolution of 0.4 eV and arrival-time resolution of 1.2…
A Wideband, Low-Noise Superconducting Amplifier with High Dynamic Range
Byeong Ho Eom, Peter K. Day, Henry G. Leduc +1
Amplifiers are ubiquitous in electronics and play a fundamental role in a wide range of scientific measurements. From a user's perspective, an ideal amplifier has very low noise, o…
Strongly quadrature-dependent noise in superconducting micro-resonators measured at the vacuum-noise limit
J. Gao, L. R. Vale, J. A. B. Mates +8
We measure frequency- and dissipation-quadrature noise in superconducting lithographed microwave resonators with sensitivity near the vacuum noise level using a Josephson parametri…
Titanium Nitride Films for Ultrasensitive Microresonator Detectors
Henry G. Leduc, Bruce Bumble, Peter K. Day +10
Titanium nitride (TiNx) films are ideal for use in superconducting microresonator detectors because: a) the critical temperature varies with composition (0 < Tc < 5 K); b) the norm…
A semi-empirical model for two-level system noise in superconducting microresonators
Jiansong Gao, Miguel Daal, John M. Martinis +6
We present measurements of the low--temperature excess frequency noise of four niobium superconducting coplanar waveguide microresonators, with center strip widths ranging fr…
Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
Jiansong Gao, Miguel Daal, Peter Day +6
We present measurements of the temperature-dependent frequency shift of five niobium superconducting coplanar waveguide microresonators with center strip widths ranging from 3 m…