Characterizing TES power noise for future single optical-phonon and infrared-photon detectors

Authors :: W. A. Page
R. Mahapatra
R. Partridge
B. Serfass
B. A. Hines
P. L. Brink
S. Zuber
C. W. Fink
Bernard Sadoulet
S. Ganjam
Noah Kurinsky
Martin E. Huber
Tsuguo Aramaki
Matt Pyle
S. L. Watkins
N. Mirabolfathi
M. Platt
Source :: AIP Advances, Vol 10, Iss 8, Pp 085221-085221-6 (2020)
Publication Year :: 2020
Publisher :: AIP Publishing LLC, 2020.
Abstract: In this letter, we present the performance of a $100~\mu\mathrm{m}\times 400~\mu\mathrm{m} \times 40~\mathrm{nm}$ tungsten (W) Transition-Edge Sensor (TES) with a critical temperature of 40 mK. This device has a measured noise equivalent power (NEP) of $1.5\times 10^{-18}\ \mathrm{W}/\sqrt{\mathrm{Hz}}$, in a bandwidth of $2.6$ kHz, indicating a resolution for Dirac delta energy depositions of $40\pm 5~\mathrm{meV}$ (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.<br />Comment: 5 pages, 6 figures. Accepted for publication at AIP Advances

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