Superconducting infrared detector arrays with integrated processing circuitry

Osterman, D. P.; Marr, P.; Dang, H.; Yao, C.T.; Radparvar, M.

doi:10.1109/20.133764

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Similar results have been observed in low temperature Nb-AlOx-Nb superconductive tunnel junction array (STJ) detectors which can be read using an integrated superconductive readout circuit [8] . Up to now, YBa2Cu3O7-x and the higher Tc oxide-phases deposited as granular films present much lower responsitivity to infrared radiation [9] .…”

Section: Interest Of Htc Junctions For Photon Detectionsupporting

confidence: 70%

HTSC films for novel optronic devices

Villégier¹,

Jaeger²,

Boucher³

et al. 1992

SPIE Proceedings

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The discovery of high Tc superconductors has revealed promising applications in optoelectronics. However a basic requirement for the development of successful novel optronic devices is the ability to fabricate high quality Josephson, tunnel or three terminal devices in a reproducible, controllable and reliable way.Large area deposition of YBCO multilayers, whole wafer processing techniques are essential and in great progress. Nevertheless, the degradation of the YBa2Cu3O7-x surface layer close to the junction contacts is observed and induces severe limitations in the devices performances. Experimental evidence of such problems and possible solutions will be presented.Whe also try to analyze some of the characteristic behaviors and defects of experimental junctions made on YBCO based multilayers. 0-8194-0728-3/92/$4.O0

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Section: Interest Of Htc Junctions For Photon Detectionsupporting

confidence: 70%

HTSC films for novel optronic devices

Villégier¹,

Jaeger²,

Boucher³

et al. 1992

SPIE Proceedings

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“…To date, Josephson junction (JJ) devices find a wide range of applications, such as highly sensitive magnetometers, infrared sensors, − single-photon detectors, and superconducting quantum circuits for quantum information purposes . Moreover, hybrid JJs formed with semiconductors placed in between two superconducting contacts have attracted great interest, − due to the possibility of tuning their superconducting properties by external electrostatic gates.…”

mentioning

confidence: 99%

Evidence of Josephson Coupling in a Few-Layer Black Phosphorus Planar Josephson Junction

et al. 2022

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Setting up strong Josephson coupling in van der Waals materials in close proximity to superconductors offers several opportunities both to inspect fundamental physics and to develop cryogenic quantum technologies. Here we show evidence of Josephson coupling in a planar few-layer black phosphorus junction. The planar geometry allows us to probe the junction behavior by means of external gates, at different carrier concentrations. Clear signatures of Josephson coupling are demonstrated by measuring supercurrent flow through the junction at milli-Kelvin temperatures. Manifestation of a Fraunhofer pattern with a transverse magnetic field is also reported, confirming the Josephson coupling. These findings represent evidence of proximity Josephson coupling in a planar junction based on a van der Waals material beyond graphene and will expedite further studies, exploiting the peculiar properties of exfoliated black phosphorus thin flakes.

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“…Note that the well-known ac Josephson effect was utilized to detect the microwave and far-infrared radiation several years ago 14 . Later, the superconducting gap voltage shifts due to visible and infrared radiation were measured in Nb/AlOx/Nb junctions 15 and junction arrays 16 at temperatures around 4.2 K. Specifically, the junctions immersed in superfluid helium were observed to have lower optical responsivity compared to those in vacuum. This is because the heating effect is suppressed in liquid helium and thus the optical responses of the devices are entirely due to the pair-breaking mechanism.…”

mentioning

confidence: 99%

Optical responses of the switching currents in Al and Nb Josephson junctions

Wang,

Zhou,

Wei

et al. 2014

Preprint

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We experimentally demonstrated the optical responses of the switching currents in two types of Josephson tunnel junctions: Al/AlOx/Al and Nb/AlOx/Nb. The radiation-induced switching current shifts were measured at ultra-low bath temperature (T ≈ 16 mK). It is observed that the Al-junction has a more sensitive optical response than the Nb-junction, which is as expected since Al electrode has a smaller superconducting gap energy. The minimum detectable radiation powers with the present Al-junction and Nb-junction are 8 pW (corresponding to 8 ×10 5 incoming photons in one measurement cycle) and 2 nW respectively. In addition, we found that the radiation-induced thermal effects are dominant in the observed optical responses. Several methods are proposed to further improve the optical responsivity, so that the josephson junction based devices could be applicable in photon detections.

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Superconducting infrared detector arrays with integrated processing circuitry

Cited by 8 publications

References 7 publications

HTSC films for novel optronic devices

HTSC films for novel optronic devices

Evidence of Josephson Coupling in a Few-Layer Black Phosphorus Planar Josephson Junction

Optical responses of the switching currents in Al and Nb Josephson junctions

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