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Proceedings Paper

Theoretical analysis of the new microwave detector based on a Josephson heterostructure
Author(s): I. A. Devyatov; M. Yu. Kupriyanov
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Paper Abstract

We consider theoretically signal and noise properties of the new type of a high-sensitivity microwave detector, based on a SINIS (Superconductor-Insulator-Normal metal-Insulator-Superconductor) Josephson junction, in which the electron energy distribution function f(ε) in the nanoscale normal metal N region is nonequilibrium due to the capacitive coupling of this region with a receiving antenna. The deviation of f(ε) from the equilibrium leads to a change in the critical current Ic of the junction, i.e., in fact, to its inductance L = Φ0/2πIc0 ≈ 2.07*10-15 Wb is the magnetic flux quantum), which is the output signal of this device. Up to now there was no calculation of the noise properties of SINIS Josephson junction bolometer, taking into account non-equilibrium form of electron distribution function f(ε) in the normal metal absorber of this detector. We make this calculations and demonstrate, that noise parameter NEP of this detector is lower, than in others modern microwave detectors.

Paper Details

Date Published: 26 February 2010
PDF: 12 pages
Proc. SPIE 7521, International Conference on Micro- and Nano-Electronics 2009, 75210M (26 February 2010); doi: 10.1117/12.854393
Show Author Affiliations
I. A. Devyatov, Lomonosov Moscow State Univ. (Russian Federation)
M. Yu. Kupriyanov, Lomonosov Moscow State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 7521:
International Conference on Micro- and Nano-Electronics 2009
Kamil A. Valiev; Alexander A. Orlikovsky, Editor(s)

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