Fully Superconducting Josephson Bolometers for Gigahertz Astronomy

Paolucci, Federico; Ligato, Nadia; Germanese, Gaia; Buccheri, Vittorio; Giazotto, Francesco

doi:10.3390/app11020746

Cited by 3 publications

(2 citation statements)

References 54 publications

(125 reference statements)

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“…The former characteristics, typical of a half-wave rectifier, here are realized for the first time exploiting an all-metallic gated superconducting Dayem bridge. We speculate that the described rectifying behavior can be suitably exploited to rectify an incoming radiation coupled to the gate through an antenna, realizing a gate-controlled version of a transition edge sensor [24][25][26]. This device could operate in an extremely wide frequency range, spanning from below 1 GHz to about 1 THz.…”

Section: (A)mentioning

confidence: 96%

Gate control of superconductivity in mesoscopic all-metallic devices

Puglia,

De Simoni,

Giazotto

2021

Preprint

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It was recently demonstrated the possibility to tune, through the application of a control gate voltage, the superconducting properties of mesoscopic devices based on Bardeen-Cooper-Schrieffer metals. In spite of the several experimental evidence obtained on different materials and geometries, a description of the microscopic mechanism at the basis of such unconventional effect has not been provided yet. This work discusses the technological potential of gate control of superconductivity in metallic superconductors and revises the experimental results which provide information regarding a possible thermal origin of the effect: in the first place, we review experiments performed on high critical temperature elemental superconductors (niobium and vanadium) and show how devices based on these materials can be exploited to realize basic electronic tools such as, e. g., a half-wave rectifier. In a second part, we discuss the origin of the gating effect by showing the gate-driven suppression of the supercurrent in a suspended titanium wire and by providing a comparison between thermal and electric switching current probability distributions. Furthermore, we discuss the cold field-emission of electrons from the gate by means of finite element simulations and compare the results with experimental data. Finally, the presented data provide a strong indication regarding the unlikelihood of thermal origin of the gating effect.

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Section: (A)mentioning

confidence: 96%

Gate control of superconductivity in mesoscopic all-metallic devices

Puglia,

De Simoni,

Giazotto

2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The former characteristics here, typical of a half-wave rectifier, are realized for the first time by exploiting an all-metallic, gated superconducting Dayem bridge. We speculate that the described rectifying behavior can be suitably exploited to rectify incoming radiations coupled to the gate through an antenna, realizing a gate-controlled version of a transition edge sensor [33][34][35]. The rectifier is based on superconducting field-effect transistor FET technology that is controlled via the application of a gate voltage in a similar way to conventional complementary metal-oxide-semiconductor CMOS technology, making the standards perfectly compatible.…”

Section: (A)mentioning

confidence: 99%

Gate Control of Superconductivity in Mesoscopic All-Metallic Devices

Puglia

Simoni²,

Giazotto³

2021

Materials

Self Cite

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The possibility to tune, through the application of a control gate voltage, the superconducting properties of mesoscopic devices based on Bardeen–Cooper–Schrieffer metals was recently demonstrated. Despite the extensive experimental evidence obtained on different materials and geometries, a description of the microscopic mechanism at the basis of such an unconventional effect has not been provided yet. This work discusses the technological potential of gate control of superconductivity in metallic superconductors and revises the experimental results, which provide information regarding a possible thermal origin of the effect: first, we review experiments performed on high-critical-temperature elemental superconductors (niobium and vanadium) and show how devices based on these materials can be exploited to realize basic electronic tools, such as a half-wave rectifier. Second, we discuss the origin of the gating effect by showing gate-driven suppression of the supercurrent in a suspended titanium wire and by providing a comparison between thermal and electric switching current probability distributions. Furthermore, we discuss the cold field-emission of electrons from the gate employing finite element simulations and compare the results with experimental data. In our view, the presented data provide a strong indication regarding the unlikelihood of the thermal origin of the gating effect.

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Cryogenic sensor enabling broad-band and traceable power measurements

Girard

Lake

Liu

et al. 2023

Review of Scientific Instruments

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Recently, great progress has been made in the field of ultrasensitive microwave detectors, reaching even the threshold for utilization in circuit quantum electrodynamics. However, cryogenic sensors lack the compatibility with broad-band metrologically traceable power absorption measurements at ultralow powers, which restricts their range of applications. Here, we demonstrate such measurements using an ultralow-noise nanobolometer, which we extend by an additional direct-current (dc) heater input. The tracing of the absorbed power relies on comparing the response of the bolometer between radio frequency and dc-heating powers traced to the Josephson voltage and quantum Hall resistance. To illustrate this technique, we demonstrate two different methods of dc-substitution to calibrate the power that is delivered to the base temperature stage of a dilution refrigerator using our in situ power sensor. As an example, we demonstrate the ability to accurately measure the attenuation of a coaxial input line between the frequencies of 50 MHz and 7 GHz with an uncertainty down to 0.1 dB at a typical input power of −114 dBm.

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Fully Superconducting Josephson Bolometers for Gigahertz Astronomy

Cited by 3 publications

References 54 publications

Gate control of superconductivity in mesoscopic all-metallic devices

Gate control of superconductivity in mesoscopic all-metallic devices

Gate Control of Superconductivity in Mesoscopic All-Metallic Devices

Cryogenic sensor enabling broad-band and traceable power measurements

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