Fast Electron Thermometry for Ultrasensitive Calorimetric Detection
Journal article, 2015

We demonstrate radio-frequency thermometry on a micrometer-sized metallic island below 100 mK. Our device is based on a normal-metal-insulator-superconductor tunnel junction coupled to a resonator with transmission readout. In the first generation of the device, we achieve 90 mu K/root Hz noise-equivalent temperature with 10 MHz bandwidth. We measure the thermal relaxation time of the electron gas in the island, which we find to be of the order of 100 mu s. Such a calorimetric detector, upon optimization, can be seamlessly integrated into superconducting circuits, with immediate applications in quantum-thermodynamics experiments down to single quanta of energy.

Author

S. Gasparinetti

K. L. Viisanen

O. P. Saira

T. Faivre

Marco Arzeo

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

M. Meschke

J. Pekola

Physical Review Applied

2331-7019 (eISSN)

Vol. 3 1

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevApplied.3.014007

More information

Created

10/7/2017