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Characterizing TES Power Noise for Future Single Optical-Phonon and Infrared-Photon Detectors

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arxiv 2004.10257 v3 pith:H6XWY5RT submitted 2020-04-21 physics.ins-det

C.W. Fink , S.L. Watkins , T. Aramaki , P.L. Brink , S. Ganjam , B.A. Hines , M.E. Huber , N.A. Kurinsky
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R. Mahapatra N. Mirabolfathi W.A. Page R. Partridge M. Platt M. Pyle B. Sadoulet B. Serfass S. Zuber
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classification physics.ins-det
keywords mathrmtimescriticaldetectorsdevicenoiseperformancepower
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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.

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Cited by 2 Pith papers

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    Random nuclear spin orientations break momentum conservation, so axion absorption in crystals excites phonons across the whole Brillouin zone, yielding a broadband detection rate proportional to the phonon density of states.

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    Spin-dependent dark matter scattering off magnons in quasi-2D (anti)ferromagnets can produce an order-10 percent daily modulation, offering directional sensitivity for keV to MeV mass dark matter.

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