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Your search keyword '"Heikkilä, T. T."' showing total 2 results
Start Over Author "Heikkilä, T. T." Publisher american institute of physics
2 results on '"Heikkilä, T. T."'

1. Physics of proximity Josephson sensor.

Author

Voutilainen, J., Laakso, M. A., and Heikkilä, T. T.

Subjects
BOLOMETERS, INFRARED detectors, OPTICAL detectors, TEMPERATURE measuring instruments, TEMPERATURE measurements, HEAT radiation & absorption
Abstract

We study the proximity Josephson sensor in both bolometric and calorimetric operation and optimize it for different temperature ranges between 25 mK and a few kelvin. We investigate how the radiation power is absorbed in the sensor and find that the irradiated system is typically in a weak nonequilibrium state. We show in detail how the proximity of the superconductors affects the device response: for example, via changes in electron-phonon coupling and out-of-equilibrium noise. In addition, we estimate the applicability of graphene as the absorber material. [ABSTRACT FROM AUTHOR]

Published
2010
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2. Rectifying Non-Gaussian Noise with Incoherent Cooper Pair Tunneling.

Author

Virtanen, P. and Heikkilä, T. T.

Subjects
*JOSEPHSON junctions, *SUPERCONDUCTORS, *SUPERCONDUCTIVITY, *ELECTRIC potential, *FLUCTUATIONS (Physics), *RANDOM noise theory, *QUANTUM tunneling
Abstract

We show how a superconducting Josephson junction in Coulomb blockade can be used to convert voltage fluctuations with a skew distribution (i.e., with a finite third cumulant) to an average current through the junction. Using this scheme, one may access the Fano factor for the third cumulant in the fluctuation source. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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