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Appl. Sci. 2016, 6(2), 35; doi:10.3390/app6020035

Detection of On-Chip Generated Weak Microwave Radiation Using Superconducting Normal-Metal SET

1
Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig 38116, Germany
2
Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Göteborg SE-412 96, Sweden
*
Author to whom correspondence should be addressed.
Academic Editors: Greg Snider and Alexei Orlov
Received: 30 November 2015 / Revised: 13 January 2016 / Accepted: 19 January 2016 / Published: 27 January 2016
(This article belongs to the Special Issue Applied Single-Electron Transistors)
View Full-Text   |   Download PDF [9631 KB, uploaded 27 January 2016]   |  

Abstract

The present work addresses quantum interaction phenomena of microwave radiation with a single-electron tunneling system. For this study, an integrated circuit is implemented, combining on the same chip a Josephson junction (Al/AlO x /Al) oscillator and a single-electron transistor (SET) with the superconducting island (Al) and normal-conducting leads (AuPd). The transistor is demonstrated to operate as a very sensitive photon detector, sensing down to a few tens of photons per second in the microwave frequency range around f ∼ 100 GHz. On the other hand, the Josephson oscillator, realized as a two-junction SQUID and coupled to the detector via a coplanar transmission line (Al), is shown to provide a tunable source of microwave radiation: controllable variations in power or in frequency were accompanied by significant changes in the detector output, when applying magnetic flux or adjusting the voltage across the SQUID, respectively. It was also shown that the effect of substrate-mediated phonons, generated by our microwave source, on the detector output was negligibly small. View Full-Text
Keywords: single-photon detector; microwave photon; single-electron transistor; photon-assisted tunneling single-photon detector; microwave photon; single-electron transistor; photon-assisted tunneling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jalali-Jafari, B.; Lotkhov, S.V.; Zorin, A.B. Detection of On-Chip Generated Weak Microwave Radiation Using Superconducting Normal-Metal SET. Appl. Sci. 2016, 6, 35.

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