Thin-Film Thermal Conductivity Measurements Using Superconducting Nanowires

Journal Article · Thu Nov 15 04:00:00 EST 2018 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/S10909-018-2022-0· OSTI ID:22809846

Kozorezov, A. G. ^[1]; Beyer, A. D.; Marsili, F.; Briggs, R. M.; Shaw, M. D. ^[2]

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1. Lancaster University, Department of Physics (United Kingdom)
2. California Institute of Technology, Jet Propulsion Laboratory (United States)

We present a simple experimental scheme for estimating the cryogenic thermal transport properties of thin films using superconducting nanowires. In a parallel array of nanowires, the heat from one nanowire in the normal state changes the local temperature around adjacent nanowires, reducing their switching current. Calibration of this change in switching current as a function of bath temperature provides an estimate of the temperature as a function of displacement from the heater. This provides a method of determining the contribution of substrate heat transport to the cooling time of superconducting nanowire single-photon detectors. Understanding this process is necessary for successful electrothermal modeling of superconducting nanowire systems.

• OSTI ID: 22809846
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 193; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CALIBRATION
COOLING TIME
HEAT
HEAT TRANSFER
HEATERS
NANOWIRES
PHOTONS
SIMULATION
SUPERCONDUCTORS
THERMAL CONDUCTIVITY
THIN FILMS