13 November 1998 Andreev-reflection-based normal-metal hot electron bolometer for space applications
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Abstract
We present the results of experimental development of an ultrasensitive normal metal hot-electron microbolometer with Andreev mirrors and electronic cooling by superconductor- insulator-normal metal (SIN) tunnel junctions. A value NEP equals 5 (DOT) 10-18 W/Hz1/2 for the temperature fluctuations component of noise and the thermal time constant (tau) equals 0.2 microseconds at 300 mK have been estimated for one of the realized devices with thermal conductance G approximately equals 6 (DOT) 10-12 W/K. At 100 mK, the thermal conductance was decreased to G approximately equals 7 (DOT) 10-14 W/K, that gives NEP equals 2 (DOT) 10-19 W/Hz1/2 for the temperature noise component and a thermal time constant (tau) equals 5 microseconds. Such microbolometer is intended as a detector of millimeter and submillimeter wave radiation for space applications.
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Alexander N. Vystavkin, Alexander N. Vystavkin, Denis Chouvaev, Denis Chouvaev, Leonid S. Kuzmin, Leonid S. Kuzmin, M. Tarasov, M. Tarasov, E. Aderstedt, E. Aderstedt, Magnus Willander, Magnus Willander, Tord Claeson, Tord Claeson, } "Andreev-reflection-based normal-metal hot electron bolometer for space applications", Proc. SPIE 3465, Millimeter and Submillimeter Waves IV, (13 November 1998); doi: 10.1117/12.331197; https://doi.org/10.1117/12.331197
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