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Gershenzon EM, Gol'tsman GN, Semenov AD, Sergeev AV. Heating of electrons in resistive state of superconducting films. Detectors, mixers and switches. In: Progress in High Temperature Superconductivity. Vol 32.; 1992. p. 190–5.
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Gershenzon EM, Gol'tsman GN, Semenov AD, Sergeev AV. Mechanism of picosecond response of granular YBaCuO films to electromagnetic radiation. Solid State Communications. 1990;76(4):493–7.
Abstract: The ultrafast mechanisms of radiation detection in granular YBaCuO films are studied in the wide wavelength range from millimeter to near infrared. With the rise of radiation frequency the Josephson detection at the grain boundary weak links is replaced by electron heating into the grains. This change occurs in the submillimeter wavelength range. Electron-phonon relaxation time τeph is determined by direct measurements and analyses quasistationary electron heating. Temperature dependence of τeph at T ≤ 40 K was found to be τeph ∼ T−1. The results show that detectors with the response time of few picoseconds at nitrogen temperature are attainable.
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Gershenzon EM, Gol'tsman GN, Zorin MA, Karasik BS, Trifonov VA. Nonequilibrium and bolometric response of YBaCuO films in a resistive state to infrared low intensity radiation. In: Council on Low-temp. Phys.; 1994. p. 82–3.
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Gershenzon E, Gershenzon ME, Gol'tsman GN, Semenov AD, Sergeev AV. Heating of quasiparticles in a superconducting film in the resistive state. JETP Lett. 1981;34(5):268–71.
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Gol'tsman GN. Hot electron bolometric mixers: new terahertz technology. Infrared Physics & Technology. 1999;40(3):199–206.
Abstract: This paper presents an overview of recent results for NbN phonon-cooled hot electron bolometric (HEB) mixers. The noise temperature of the receivers based on both quasioptical and waveguide versions of HEB mixers has crossed the level of 1 K GHz−1 at 430 GHz (410 K), 600–650 GHz (480 K), 750 GHz (600 K), 810 GHz (780 K) and is close to that level at 1.1 THz (1250 K) and 2.5 THz (4500 K). The gain bandwidth measured for quasioptical HEB mixer at 620 GHz reached 4 GHz and the noise temperature bandwidth was almost 8 GHz. Local oscillator power requirements are about 1 μW for mixers made by photolithography and about 100 nW for mixers made by e-beam lithography. A waveguide version of 800 GHz receiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, AZ, to conduct astronomical observations of known submillimeter lines (CO, J=7→6, CI, J=2→1). It was proved that the receiver works as a practical instrument.
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