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Gol’tsman GN, Smirnov KV. Electron-phonon interaction in a two-dimensional electron gas of semiconductor heterostructures at low temperatures. Jetp Lett. 2001;74(9):474–9.
Abstract: Theoretical and experimental works devoted to studying electron-phonon interaction in the two-dimensional electron gas of semiconductor heterostructures at low temperatures in the case of strong heating in an electric field under quasi-equilibrium conditions and in a quantizing magnetic field perpendicular to the 2D layer are considered.
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Gol’tsman GN, Okunev O, Chulkova G, Lipatov A, Semenov A, Smirnov K, et al. Picosecond superconducting single-photon optical detector. Appl Phys Lett. 2001;79(6):705–7.
Abstract: We experimentally demonstrate a supercurrent-assisted, hotspot-formation mechanism for ultrafast detection and counting of visible and infrared photons. A photon-induced hotspot leads to a temporary formation of a resistive barrier across the superconducting sensor strip and results in an easily measurable voltage pulse. Subsequent hotspot healing in ∼30 ps time frame, restores the superconductivity (zero-voltage state), and the detector is ready to register another photon. Our device consists of an ultrathin, very narrow NbN strip, maintained at 4.2 K and current-biased close to the critical current. It exhibits an experimentally measured quantum efficiency of ∼20% for 0.81 μm wavelength photons and negligible dark counts.
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Gol'tsman G, Semenov A, Smirnov K, Voronov B. Background limited quantum superconducting detector for submillimeter wavelengths. In: Proc. 12th Int. Symp. Space Terahertz Technol.; 2001. p. 469–75.
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Gershenson ME, Gong D, Sato T, Karasik BS, Sergeev AV. Millisecond electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures. Appl. Phys. Lett.. 2001;79:2049–51.
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Ganzevles WFM, Gao JR, de Korte PAJ, Klapwijk TM. Direct response of microstrip line coupled Nb THz hot-electron bolometer mixers. Appl Phys Lett. 2001;79(15):2483–5.
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Eliasson BJ. Metal-insulator-metal diodes for solar energy conversion [Ph.D. thesis].; 2001.
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Danny Wilms Floet. Hotspot mixing in THz niobium superconducting hot electron bolometer mixers [Ph.D. thesis]. Netherlands; 2001.
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Codreanu I, Boreman GD. Infrared microstrip dipole antennas. Microw Opt Technol Lett. 2001;29(6):381–3.
Abstract: Abstract 10.1002/mop.1184.abs We report on the successful use of niobium microbolometers coupled to microstrip dipole antennas for the detection of midinfrared radiation. Measurements of the detector response versus antenna length performed at the 10.6 μm wavelength allowed us to identify the first three current-wave resonances along the antenna arms. The detector response was also measured as a function of the radiation wavelength in the 911 μm spectral domain. Excellent agreement between the experimental results and finite-difference time-domain (FDTD) predictions was obtained.
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Cherednichenko S, Kroug M, Merkel H, Kollberg E, Loudkov D, Smirnov K, et al. Local oscillator power requirement and saturation effects in NbN HEB mixers. In: Jet Propulsion Laboratory CIit.u.t.e of T, editor. Proc. 12th Int. Symp. Space Terahertz Technol. San Diego, CA, USA; 2001. p. 273–85.
Abstract: The local oscillator power required for NbN hot-electron bolometric mixers (P LO ) was investigated with respect to mixer size, critical temperature and ambient temperature. P LO can be decreased by a factor of 10 as the mixer size decreases from 4×0.4 µm 2 to 0.6×0.13 µm 2 . For the smallest volume mixer the optimal local oscillator power was found to be 15 nW. We found that for such mixer no signal compression was observed up to an input signal of 2 nW which corresponds to an equivalent input load of 20,000 K. For a constant mixer volume, reduction of T c can decrease optimal local oscillator power at least by a factor of 2 without a deterioration of the receiver noise temperature. Bath temperature was found to have minor effect on the receiver characteristics.
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Chen PS. Infrared properties of barium stars. A&A. 2001;372(1):245–8.
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