Optimization of the Microwave Properties of the Kinetic-Inductance Bolometer (KIBO)

Arndt, M.; Wuensch, S.; Groetsch, Christopher; Merker, Michael; Zieger, Gabriel; Peiselt, Katja; Anders, S.; Meyer, H.‐G.; Siegel, M.

doi:10.1109/tasc.2017.2653098

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…TKIDs have been developed as energy detectors for x-ray imaging spectroscopy 41 to simultaneously achieve high spatial and energy resolution and for thermal x-ray photon detection. 42 TKIDs have also been used as THz radiation detectors [43][44][45][46] operating at Kelvin-range temperatures. However, TKIDs have not yet been demonstrated as power detectors for millimeter-wave instruments that operate at sub-Kelvin temperatures.…”

Section: Introductionmentioning

confidence: 99%

Thermal kinetic inductance detectors for millimeter-wave detection

Wandui

Bock

Frez

et al. 2020

Journal of Applied Physics

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Thermal Kinetic-Inductance Detectors (TKIDs) combine the excellent noise performance of traditional bolometers with a radio frequency multiplexing architecture that enables the large detector counts needed for the next generation of millimeter-wave instruments. In this paper, we first discuss the expected noise sources in TKIDs and derive the limits where the phonon noise contribution dominates over the other detector noise terms: generation-recombination, amplifier, and two-level system noise. Second, we characterize aluminum TKIDs in a dark environment. We present measurements of TKID resonators with quality factors of about 10 5 at 80 mK. We also discuss the bolometer thermal conductance, heat capacity, and time constants. These were measured by the use of a resistor on the thermal island to excite the bolometers. These dark aluminum TKIDs demonstrate a noise equivalent power, NEP = 2 Â 10 À17 W= ffiffiffiffiffiffi Hz p , with a 1=f knee at 0.1 Hz, which provides background noise limited performance for ground-based telescopes observing at 150 GHz.

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Section: Introductionmentioning

confidence: 99%

Thermal kinetic inductance detectors for millimeter-wave detection

Wandui

Bock

Frez

et al. 2020

Journal of Applied Physics

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“…A system NEP ~ 10 -15 W/Hz For bolometers on a SiNx membrane the necessary Gth has been already demonstrated [26,13] at moderately low temperatures (1 -5 K). A TES with suitable Tc and a slope on R-T curve could be fabricated, for example, from a 10-nm-thin niobium film with reduced critical temperature due to the intrinsic proximity effect [27].…”

Section: A Tes Optimizationmentioning

confidence: 99%

Terahertz Transition-Edge Sensor With Kinetic-Inductance Amplifier at 4.2 K

Kuzmin

Doerner

Charaev

et al. 2018

IEEE Trans. THz Sci. Technol.

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Different terrestrial terahertz applications would benefit from large-format arrays, operating in compact and inexpensive cryocoolers at liquid helium temperature with sensitivity, limited by the 300-K background radiation only. A voltage-biased Transition-Edge Sensor (TES) as a THz detector can have sufficient sensitivity and has a number of advantages important for real applications as linearity of response, high dynamic range and a simple calibration, however it requires a low-noise current readout. Usually, a current amplifier based on Superconducting Quantum-Interference Device (SQUID) is used for readout, but the scalability of this approach is limited due to complexity of the operation and fabrication. Recently, it has been shown that instead of SQUID it is possible to use a current sensor, which is based on the nonlinearity of the kinetic inductance of a current-carrying superconducting stripe. Embedding the stripe into a microwave high-Q superconducting resonator allows for reaching sufficient current sensitivity. More important, it is possible with the resonator approach to scale up to large arrays using Frequency-Division Multiplexing (FDM) in GHz range. Here, we demonstrate the operation of a voltagebiased TES with a microwave kinetic-inductance current amplifier at 4.2 K. We measured the expected intrinsic Noise-Equivalent Power NEP ~ 5×10 -14 W/Hz 1/2 and confirmed that a sufficient sensitivity of the readout can be reached in conjunction with a real TES operation. The construction of an array with the improved sensitivity ~ 10 -15 W/Hz 1/2 at 4.2 K could be realized using a combination of the new current amplifier and already existing TES detectors with improved thermal isolation. I. INTRODUCTIONLARGE-format arrays of THz detectors are required today in different terrestrial applications. Among them is THz passive security scanning for concealed hazardous objects, THz imaging for non-destructive testing (NDT) in production lines and imaging far-infrared Fourier-Transform Spectroscopy for material research and atmospheric studies [1][2][3][4][5].Along with the large number of detectors in an array, these applications would benefit from the high sensitivity. The background-limited Noise-Equivalent Power (NEP) is of high importance for passive scanning applications with a stand-off

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“…We present observations of strong negative electrothermal feedback in a thermal kinetic inductance detector (TKID). TKIDs are cryogenic bolometers that detect minute power fluctuations by measuring the temperature fluctuations of a suspended absorber [1][2][3][4][5][6] . The suspended absorber is connected to a thermal bath with a weak thermal link so that the incident power and the suspended absorber temperature are related approximately linearly.…”

Section: Introductionmentioning

confidence: 99%

Strong negative electrothermal feedback in thermal kinetic inductance detectors

Agrawal

Steinbach

Bock

et al. 2021

Journal of Applied Physics

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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.

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Optimization of the Microwave Properties of the Kinetic-Inductance Bolometer (KIBO)

Cited by 5 publications

References 15 publications

Thermal kinetic inductance detectors for millimeter-wave detection

Thermal kinetic inductance detectors for millimeter-wave detection

Terahertz Transition-Edge Sensor With Kinetic-Inductance Amplifier at 4.2 K

Strong negative electrothermal feedback in thermal kinetic inductance detectors

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