Characterizing TES power noise for future single optical-phonon and infrared-photon detectors Academic Article uri icon


  • In this letter, we present the performance of a $100~mumathrm{m} imes 400~mumathrm{m} imes 40~mathrm{nm}$ tungsten (W) Transition-Edge Sensor (TES) with a critical temperature of 40 mK. This device has a measured noise equivalent power (NEP) of $1.5 imes 10^{-18} mathrm{W}/sqrt{mathrm{Hz}}$, in a bandwidth of $2.6$ kHz, indicating a resolution for Dirac delta energy depositions of $40pm 5~mathrm{meV}$ (rms). The performance demonstrated by this device is a critical step towards developing a $mathcal{O}(100)~mathrm{meV}$ threshold athermal phonon detectors for low-mass dark matter searches.

author list (cited authors)

  • Fink, C. W., Watkins, S. L., Aramaki, T., Brink, P. L., Ganjam, S., Hines, B. A., ... Zuber, S.

citation count

  • 6

publication date

  • August 2020