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Design of a superconducting bolometer for low-power standards in the millimetre wave field

Domenico Andreone, L. Brunetti, M. Petrizzelli

Sensors and Actuators A PhysicalApr 1, 19942 citations

Superconducting antenna-coupled YBCO bolometers at submillimeter wavelengths

A. Scheuring, Petra Probst, C. Dischke +2 more

Jan 1, 20100 citations

Voltage-Biased Superconducting TES Bolometers for the Far-Infrared to Millimeter Wavelength Range

Adrian Tae-Jin Lee, Sherry Cho, Jan M. Gildemeister +10 more

Jan 1, 20021 citation

Superconducting nanowire bolometers

Daniel M. Bock

Jan 1, 20060 citations

A hot-electron direct detector for radioastronomy

Boris S. Karasik, William R. McGrath, Henry George LeDuc +1 more

A hot-electron transition-edge superconducting bolometer with adjustable thermal relaxation speed is proposed. The bolometer contacts are made from a superconductor with high critical temperature which blocks the thermal diffusion of hot carriers into the contacts. Thus electron-phonon interaction is the only mechanism for heat removal. The speed of thermal relaxation for hot electrons in a nanometre-size superconducting bolometer with T c = 100-300 mK is controlled by the elastic electron mean free path l . The relaxation rate behaves as T 4 l at subkelvin temperatures and can be reduced by a factor of 10-100 by decreasing l . Then an antenna- or waveguide-coupled bolometer with a time constant ~10 -3 -10 -4 s will exhibit photon-noise-limited performance at millimetre and submillimetre wavelengths. The bolometer will have a figure of merit NEP 1/2 = 10 -23 -10 -22 J -1 at 100 mK which is 10 3 -10 4 times better (i.e. smaller) than that of a state-of-the-art bolometer. A tremendous increase in speed and sensitivity will have a significant impact for observational mapping applications.A hot-electron transition-edge superconducting bolometer with adjustable thermal relaxation speed is proposed. The bolometer contacts are made from a superconductor with high critical temperature which blocks the thermal diffusion of hot carriers into the contacts. Thus electron-phonon interaction is the only mechanism for heat removal. The speed of thermal relaxation for hot electrons in a nanometre-size superconducting bolometer with T c = 100-300 mK is controlled by the elastic electron mean free path l . The relaxation rate behaves as T 4 l at subkelvin temperatures and can be reduced by a factor of 10-100 by decreasing l . Then an antenna- or waveguide-coupled bolometer with a time constant ~10 -3 -10 -4 s will exhibit photon-noise-limited performance at millimetre and submillimetre wavelengths. The bolometer will have a figure of merit NEP 1/2 = 10 -23 -10 -22 J -1 at 100 mK which is 10 3 -10 4 times better (i.e. smaller) than that of a state-of-the-art bolometer. A tremendous increase in speed and sensitivity will have a significant impact for observational mapping applications.

Superconductor Science and TechnologyNov 1, 199941 citations

Applications of the josephson effects in the millimetre and submillimetre wavelength regions

T. G. Blaney

The Josephson effects, which arise at a suitable junction between two pieces of superconducting material, have several applications at millimetre and submillimetre wavelengths. Devices based on the effects can be used as video detectors, harmonic mixers and frequency analysers, often with unique properties. These and other possible applications are described, and the current experimental situation using the ‘point contact’ type of junction is outlined.

Radio and Electronic EngineerJan 1, 19724 citations

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