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Fast Electron Thermometry for Ultrasensitive Calorimetric Detection

S. Gasparinetti ; K. L. Viisanen ; O. P. Saira ; T. Faivre ; Marco Arzeo (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; M. Meschke ; J. P. Pekola
Physical Review Applied (2331-7019). Vol. 3 (2015), 1,
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2015-03-02. Senast ändrad 2015-03-02.
CPL Pubid: 213291


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik



Chalmers infrastruktur