High-T&lt;inf&gt;c&lt;/inf&gt; superconducting step-edge Josephson junction detector for terahertz imaging

Du, Jia; Macfarlane, J.C.; Leslie, Keith; Foley, C. P.; Hellicar, Andrew; Li, L.; Hanham, Stephen M.

doi:10.1109/asemd.2009.5306678

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…However, the A-B model is still the basic, simplest and most widely-used model to analyze Josephson currents, including in superconducting cuprates [24,25]. For example, this model is the standard model to describe c-axis superconducting currents in cuprates, since Kleiner et al [26] showed that the A-B model works quite well.…”

Section: Model Descriptionmentioning

confidence: 99%

Two-band induced superconductivity in single-layer graphene and topological insulator bismuth selenide

Talantsev

Crump

Tallon

2017

Supercond. Sci. Technol.

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Proximity-induced superconductivity in single-layer graphene (SLG) and in topological insulators represent almost ideal examples of superconductivity in two dimensions. Fundamental mechanisms governing superconductivity in the 2D limit are of central interest for modern condensed-matter physics. To deduce fundamental parameters of superconductor/ graphene/superconductor and superconductor/bismuth selenide/superconductor junctions we investigate the self-field critical currents in these devices using the formalism of the Ambegaokar-Baratoff model. Our central finding is that the induced superconducting state in SLG and bismuth selenide each exhibits gapping on two superconducting bands. Based on recent results obtained on ultra-thin films of natural superconductors, including single-atomic layer of iron selenide, double and triple atomic layers of gallium, and several atomic layer tantalum disulphide, we conclude that a two-band induced superconducting state in SLG and bismuth selenide is part of a wider, more general multiple-band phenomenology of currently unknown origin.

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Section: Model Descriptionmentioning

confidence: 99%

Two-band induced superconductivity in single-layer graphene and topological insulator bismuth selenide

Talantsev

Crump

Tallon

2017

Supercond. Sci. Technol.

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“…Earlier reported results were obtained with the detector cooled in a cryostat filled with liquid helium [18] or liquid nitrogen [19][20][21]. We have since integrated the HTS detector and detector array in a pulse-tube cryocooler as shown in Fig 10. The aim is to develop a cryogen-free THz imaging system for industrial acceptance.…”

Section: Hts Josephson Junction Thz Detector Array For Imagingmentioning

confidence: 94%

“…We have recently developed HTS step-edge Josephson junction THz detector and demonstrated THz imaging [18][19][20][21]. We optimize our step-edge Josephson junctions to achieve a maximum response to a signal frequency of 0.2 -0.6 THz for operating temperatures at 77 K [19][20][21].…”

Section: Hts Josephson Junction Thz Detector Array For Imagingmentioning

confidence: 99%

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HTS Josephson junction devices for microwave and terahertz applications

2011

2011 International Conference on Applied Superconductivity and Electromagnetic Devices

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The CSIRO Applied Superconductivity Group has a long-term effort in research and development of superconducting electronic devices and systems for various practical applications. In this paper, I will mainly describe our recent research progress in developing novel HTS Josephson devices for high frequency applications. Specifically, we have recently developed a novel HTS Josephson heterodyne gigahertz (GHz) microwave oscillator and on-chip down-converter (mixer). For even higher frequency application, we developed a HTS Josephson junction terahertz (THz) detector and applied it successfully to THz imaging. I will highlight some of the recent results and describe the on-going effort of developing an array of such detectors and associated electronics as well as system integration.

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Tunable and self-pumped THz receiver with super- wide band and high sensitivity

Xiong

Zhang

et al. 2015

2015 IEEE International RF and Microwave Conference (RFM)

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High-T<inf>c</inf> superconducting step-edge Josephson junction detector for terahertz imaging

Cited by 3 publications

References 11 publications

Two-band induced superconductivity in single-layer graphene and topological insulator bismuth selenide

Two-band induced superconductivity in single-layer graphene and topological insulator bismuth selenide

HTS Josephson junction devices for microwave and terahertz applications

Tunable and self-pumped THz receiver with super- wide band and high sensitivity

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