Josephson junction based thermometer and its application in bolometry

Abstract

We propose a new type of a transition edge sensor based on an Al/AlOx/Ti/AlOx/Al superconductor - insulator - superconductor - insulator - superconductor (SIS'IS) structure. It exhibits sharp dependence of zero bias resistance on temperature of the titanium absorber in the vicinity of its superconducting critical temperature. We demonstrate temperature sensitivity of the device to be $2\mu \text{K}/\sqrt{\text{Hz}}$. Noise Equivalent Power (NEP) of the device, limited by the amplifier noise, is estimated to be $4\times 10^{-17}\mathrm{W}/\sqrt{\mathrm{Hz}}$ at 313 mK. The tunnel junctions between superconducting leads should help to overcome the size limitation imposed by proximity effect in conventional transition edge sensors, without sacrificing the sensitivity. Besides that, the input resistance of the device can be tuned in a wide range.

References in corpus (6)

• The Josephson critical current in a long mesoscopic S-N-S junction
• Single-mode heat conduction by photons
• Ultra-Sensitive Hot-Electron Nanobolometers for Terahertz Astrophysics
• Nanobolometers for THz Photon Detection
• Heat transport through a Josephson junction
• Manipulation and Generation of Supercurrent in Out-of-Equilibrium Josephson Tunnel Nanojunctions

Cited by in corpus (8)

• Nanoscale thermal imaging of dissipation in quantum systems
• Ferromagnetic insulator-based superconducting junctions as sensitive electron thermometers
• Ultra-efficient superconducting Dayem bridge field-effect transistor
• A cascade electronic refrigerator using superconducting tunnel junctions
• Thermal signature of Majorana fermions in Josephson junction
• Accurate determination of the Josephson critical current by lock-in measurements
• Ehrenfest approach to open double-well dynamics
• Effects of the thin-film thickness on superconducting NbTi microwave resonators for on-chip cryogenic thermometry