26 February 2010 Theoretical analysis of the new microwave detector based on a Josephson heterostructure
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Proceedings Volume 7521, International Conference on Micro- and Nano-Electronics 2009; 75210M (2010) https://doi.org/10.1117/12.854393
Event: International Conference on Micro- and Nano-Electronics 2009, 2009, Zvenigorod, Russian Federation
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.
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I. A. Devyatov, I. A. Devyatov, M. Yu. Kupriyanov, M. Yu. Kupriyanov, } "Theoretical analysis of the new microwave detector based on a Josephson heterostructure", Proc. SPIE 7521, International Conference on Micro- and Nano-Electronics 2009, 75210M (26 February 2010); doi: 10.1117/12.854393; https://doi.org/10.1117/12.854393
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