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Gershenzon EM, Gol'tsman GN, Semenov AD. Submillimeter backward wave tube spectrometer for measuring superconducting film transmission. Pribory i Tekhnika Eksperimenta. 1983;26(5):134–7.
Abstract: A spectrometer employing six backward wave tubes is described. It is intended for investigation of superconductors in the 0.2-3 mm range of wave lengths. During the measurement of the transmission spectrum it is possible to determine the energy gap for superconduct1ng films 50 to 4000 A thick. The transmission factor can vary from 10-1 to 10-9. Spectrum of relation of film transmission factors in superconducting and normal states is measured for determining the energy gap 2 Δ. The transmission spectrum obtained by means of a computer for vanadium film 300 A thick is given as an example. The energy gap 2 Δ = 1.4 MeV
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Gao JR, Hajenius M, Baselmans JJA, Yang ZQ, Baryshev AM, Barends R, et al. Twin-slot antenna coupled NbN hot electron bolometer mixers for space applications. In: Proc. 9-th WMSCI. Vol 9. International Institute of Informatics and Systemics; 2005. p. 148–53.
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Ryabchun SA, Tretyakov IV, Finkel MI, Maslennikov SN, Kaurova NS, Seleznev VA, et al. NbN phonon-cooled hot-electron bolometer mixer with additional diffusion cooling. In: Proc. 20th Int. Symp. Space Terahertz Technol. Charlottesville, USA; 2009. p. 151–4.
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Gershenzon EM, Gol'tsman GN, Ptitsina NG. Observation of the free-exciton spectrum at submillimeter wavelengths. JETP Lett. 1972;16(4):161–2.
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Verevkin AA, Ptitsina NG, Smirnov KV, Gol'tsman GN, Voronov BM, Gershenzon EM, et al. Hot electron bolometer detectors and mixers based on a superconducting-two-dimensional electron gas-superconductor structure. In: Proc. 4-th Int. Semicond. Device Research Symp.; 1997. p. 163–6.
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