Lumped element kinetic inductance detectors based on two-gap MgB2 thin films

2018 ◽  
Vol 112 (2) ◽  
pp. 022601 ◽  
Author(s):  
C. Yang ◽  
R. R. Niu ◽  
Z. S. Guo ◽  
X. W. Cai ◽  
H. M. Chu ◽  
...  
2019 ◽  
Vol 199 (3-4) ◽  
pp. 994-1003
Author(s):  
Faouzi Boussaha ◽  
Samir Beldi ◽  
Alessandro Monfardini ◽  
Jie Hu ◽  
Martino Calvo ◽  
...  

2016 ◽  
Vol 184 (1-2) ◽  
pp. 97-102 ◽  
Author(s):  
A. Paiella ◽  
A. Coppolecchia ◽  
M. G. Castellano ◽  
I. Colantoni ◽  
A. Cruciani ◽  
...  

2018 ◽  
Vol 193 (3-4) ◽  
pp. 157-162
Author(s):  
A. Gomez ◽  
M. Calvo ◽  
J. Goupy ◽  
A. Bideaud ◽  
F. Lévy-Bertrand ◽  
...  

2020 ◽  
Vol 200 (5-6) ◽  
pp. 239-246
Author(s):  
A. L. Hornsby ◽  
P. S. Barry ◽  
S. M. Doyle ◽  
Q. Y. Tang ◽  
E. Shirokoff

Abstract Arrays of lumped-element kinetic inductance detectors (LEKIDs) optically coupled through an antenna-coupled transmission line are a promising candidate for future cosmic microwave background experiments. However, the dielectric materials used for the microstrip architecture are known to degrade the performance of superconducting resonators. In this paper, we investigate the feasibility of microstrip coupling to a LEKID, focusing on a systematic study of the effect of depositing amorphous silicon nitride on a LEKID. The discrete and spatially separated inductive and capacitive regions of the LEKID allow us to vary the degree of dielectric coverage and determine the limitations of the microstrip coupling architecture. We show that by careful removal of dielectric from regions of high electric field in the capacitor, there is minimal degradation in dielectric loss tangent of a partially covered lumped-element resonator. We present the effects on the resonant frequency and noise power spectral density and, using the dark responsivity, provide an estimate for the resulting detector sensitivity.


2016 ◽  
Vol 87 (3) ◽  
pp. 033105 ◽  
Author(s):  
Sam Rowe ◽  
Enzo Pascale ◽  
Simon Doyle ◽  
Chris Dunscombe ◽  
Peter Hargrave ◽  
...  

2020 ◽  
Vol 199 (1-2) ◽  
pp. 34-44 ◽  
Author(s):  
Songyuan Zhao ◽  
S. Withington ◽  
D. J. Goldie ◽  
C. N. Thomas

AbstractSuperconducting thin films are central to the operation of many kinds of quantum sensors and quantum computing devices: kinetic inductance detectors (KIDs), travelling-wave parametric amplifiers (TWPAs), qubits, and spin-based quantum memory elements. In all cases, the nonlinearity resulting from the supercurrent is a critical aspect of behaviour, either because it is central to the operation of the device (TWPA), or because it results in nonideal second-order effects (KID). Here, we present an analysis of supercurrent-carrying superconducting thin films that is based on the generalized Usadel equations. Our analysis framework is suitable for both homogeneous and multi-layer thin films, and can be used to calculate the resulting density of states, superconducting transition temperature, superconducting critical current, complex conductivities, complex surface impedances, transmission line propagation constants, and nonlinear kinetic inductances in the presence of supercurrent. Our analysis gives the scale of kinetic inductance nonlinearity ($$I_*$$I∗) for a given material combination and geometry, and is important in optimizing the design of detectors and amplifiers in terms of materials, geometries, and dimensions. To investigate the validity of our analysis across a wide range of supercurrent, we have measured the transition temperatures of superconducting thin films as a function of DC supercurrent. These measurements show good agreement with our theoretical predictions in the experimentally relevant range of current values.


2014 ◽  
Vol 85 (12) ◽  
pp. 123117 ◽  
Author(s):  
H. McCarrick ◽  
D. Flanigan ◽  
G. Jones ◽  
B. R. Johnson ◽  
P. Ade ◽  
...  

2008 ◽  
Author(s):  
Simon Doyle ◽  
Jack Naylon ◽  
Philip Mauskopf ◽  
Adrian Porch ◽  
Stafford Withington ◽  
...  

2016 ◽  
Vol 05 (04) ◽  
pp. 1641003 ◽  
Author(s):  
Samuel Gordon ◽  
Brad Dober ◽  
Adrian Sinclair ◽  
Samuel Rowe ◽  
Sean Bryan ◽  
...  

We present a highly frequency multiplexed readout for large-format superconducting detector arrays intended for use in the next generation of balloon-borne and space-based sub-millimeter and far-infrared missions. We will demonstrate this technology on the upcoming NASA Next Generation Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST-TNG) to measure the polarized emission of Galactic dust at wavelengths of 250, 350 and 500 microns. The BLAST-TNG receiver incorporates the first arrays of Lumped Element Kinetic Inductance Detectors (LeKID) along with the first microwave multiplexing readout electronics to fly in a space-like environment and will significantly advance the TRL for these technologies. After the flight of BLAST-TNG, we will continue to improve the performance of the detectors and readout electronics for the next generation of balloon-borne instruments and for use in a future FIR Surveyor.


2021 ◽  
Vol 69 (1) ◽  
pp. 578-589
Author(s):  
Beatriz Aja ◽  
Marina C. de Ory ◽  
Luisa de la Fuente ◽  
Eduardo Artal ◽  
Juan Pablo Pascual ◽  
...  

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