Low noise MgB2 terahertz hot-electron bolometer mixers

Bevilacqua, S.; Cherednichenko, S.; Drakinskiy, V.; Stake, J.; Shibata, H.; Tokura, Y.

doi:doi:10.1063/1.3678027

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We report on low noise terahertz bolometric mixers made of MgB₂ superconducting thin films. For a 10-nm-thick MgB₂ film, the lowest mixer noise temperature was 600 K at 600 GHz. For 30 to 10-nm-thick films, the mixer gain bandwidth is an inverse function of the film thickness, reaching 3.4 GHz for the 10-nm film. As the critical temperature of the film decreases, the gain bandwidth also decreases, indicating the importance of high quality thin films for large gain bandwidth mixers. The results indicate the prospect of achieving a mixer gain bandwidth as large as 10-8 GHz for 3 to 5-nm-thick MgB₂ films.

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KEYWORDS, PACS, and IPC

Keywords

magnesium compounds, submillimetre wave mixers, superconducting thin films

PACS

84.30.Qi

Modulators and demodulators; discriminators, comparators, mixers, limiters, and compressors

International Patent Classification (IPC)

H01B12/00
Superconductive or hyperconductive conductors, cables, or transmission lines

ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1063/1.3678027

PUBLICATION DATA

ISSN

0003-6951 (print)

1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef

American Institute of Physics

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