Multifunctional Superconducting Nanowire Quantum Sensors
- URL: http://arxiv.org/abs/2103.09896v1
- Date: Wed, 17 Mar 2021 20:23:59 GMT
- Title: Multifunctional Superconducting Nanowire Quantum Sensors
- Authors: Benjamin J Lawrie, Claire E. Marvinney, Yun-Yi Pai, Matthew A.
Feldman, Jie Zhang, Aaron J. Miller, Chengyun Hua, Eugene Dumitrescu, G\'abor
B. Hal\'asz
- Abstract summary: Superconducting nanowire single photon detectors (SNSPDs) offer high-quantum-efficiency and low-dark-count-rate single photon detection.
Here, we demonstrate robust performance of amorphous SNSPDs in magnetic fields of up to $pm 6$ T with a negligible dark count rate.
We also show that the SNSPD can be used as a magnetometer with sensitivity of better than 100 $mathrmmu T/sqrtHz$ and as a thermometer with sensitivity of 20 $mathrmmu K/sqrtHz
- Score: 2.8179433392269817
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Superconducting nanowire single photon detectors (SNSPDs) offer
high-quantum-efficiency and low-dark-count-rate single photon detection. In a
growing number of cases, large magnetic fields are being incorporated into
quantum microscopes, nanophotonic devices, and sensors for nuclear and
high-energy physics that rely on SNSPDs, but superconducting devices generally
operate poorly in large magnetic fields. Here, we demonstrate robust
performance of amorphous SNSPDs in magnetic fields of up to $\pm 6$ T with a
negligible dark count rate and unchanged quantum efficiency at typical bias
currents. Critically, we also show that in the electrothermal oscillation
regime, the SNSPD can be used as a magnetometer with sensitivity of better than
100 $\mathrm{\mu T/\sqrt{Hz}}$ and as a thermometer with sensitivity of 20
$\mathrm{\mu K/\sqrt{Hz}}$ at 1 K. Thus, a single photon detector integrated
into a quantum device can be used as a multifunctional quantum sensor capable
of describing the temperature and magnetic field on-chip simply by varying the
bias current to change the operating modality from single photon detection to
thermometry or magnetometry.
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