Strong Negative Electrothermal Feedback in Thermal Kinetic Inductance Detectors

Abstract

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 $\mathcal{L}$ $\approx$ 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.

arXiv comment8 pages, 9 figures, The following article has been submitted to the Journal of Applied Physics. After it is published, it will be found at https://publishing.aip.org/resources/librarians/products/journals/

References in corpus (11)

• An analysis method for asymmetric resonator transmission applied to superconducting devices
• Operation of a titanium nitride superconducting microresonator detector in the nonlinear regime
• A Transition-edge Sensor-based X-ray Spectrometer for the Study of Highly Charged Ions at the National Institute of Standards and Technology Electron Beam Ion Trap
• X-ray photon detection using superconducting resonators in thermal quasi-equilibrium
• Thermal Kinetic Inductance Detectors for millimeter-wave detection
• Advanced ACTPol Low Frequency Array: Readout and Characterization of Prototype 27 and 39 GHz Transition Edge Sensors
• Electrothermal Model of Kinetic Inductance Detectors
• Performance of Al-Mn Transition-Edge Sensor Bolometers in SPT-3G
• A flexible GPU-accelerated radio-frequency readout for superconducting detectors
• Characterizing the Sensitivity of 40 GHz TES Bolometers for BICEP Array
• Electrothermal Feedback in Kinetic Inductance Detectors