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Strong negative electrothermal feedback in thermal kinetic inductance detectors

Agrawal, Shubh and Steinbach, Bryan and Bock, James J. and Frez, Clifford and Minutolo, Lorenzo and Nguyen, Hien and O'Brient, Roger and Turner, Anthony and Wandui, Albert (2021) Strong negative electrothermal feedback in thermal kinetic inductance detectors. Journal of Applied Physics, 130 (12). Art. No. 124503. ISSN 0021-8979. doi:10.1063/5.0064723.

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We demonstrate strong negative electrothermal feedback accelerating and linearizing the response of a thermal kinetic inductance detector (TKID). TKIDs are a proposed highly multiplexable replacement to transition-edge sensors and measure power through the temperature-dependent resonant frequency of a superconducting microresonator bolometer. At high readout probe power and probe frequency detuned from the TKID resonant frequency, we observe electrothermal feedback loop gain up to ℒ≈16 through measuring the reduction of settling time. We also show that the detector response has no detectable non-linearity over a 38% range of incident power and that the noise-equivalent power is below the design photon noise.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Agrawal, Shubh0000-0003-2429-5811
Steinbach, Bryan0000-0001-6544-7469
Bock, James J.0000-0002-5710-5212
Minutolo, Lorenzo0000-0002-4876-112X
O'Brient, Roger0000-0002-4987-6375
Wandui, Albert0000-0002-8232-7343
Additional Information:© 2021 Author(s). Published under an exclusive license by AIP Publishing. Submitted: 26 July 2021; Accepted: 14 September 2021; Published Online: 28 September 2021. Our work was carried out at the Jet Propulsion Laboratory, Caltech, under contract from the National Aeronautics and Space Administration. We thank Mark Lindeman and Jonas Zmuidzinas for insightful discussion. Shubh Agrawal’s work was supported by the Dr. Gary Stupian SURF Fellowship. Data Availability: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Group:Astronomy Department
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20210831-203945767
Persistent URL:
Official Citation:Shubh Agrawal, Bryan Steinbach, James J. Bock, Clifford Frez, Lorenzo Minutolo, Hien Nguyen, Roger O’Brient, Anthony Turner, and Albert Wandui , "Strong negative electrothermal feedback in thermal kinetic inductance detectors", Journal of Applied Physics 130, 124503 (2021)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110659
Deposited By: George Porter
Deposited On:01 Sep 2021 14:21
Last Modified:05 Oct 2021 20:30

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