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Quasioptical superconducting hot electron bolometer for submillmeter waves

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Abstract

We report on a superconducting hot electron bolometer coupled to radiation via a broadband antenna. The bolometer, a structured NbN film, was patterned on a thin dielectric membrane between terminals of a gold slotline antenna. We investigated the response to submillimeter radiation (wave-lengths ∼ 0.1 mm to 0.7 mm) in the fundamental Gaussian mode. We found that the directivity of the antenna was constant within a factor of 2.5 through the whole experimental range. The noise equivalent power of the bolometer at 119 µm was ∼ 3 · 10−13 W/Hz1/2; a time constant of ∼ 160 ps was estimated.

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Gousev, Y.P., Gol'tsman, G.N., Karasik, B.S. et al. Quasioptical superconducting hot electron bolometer for submillmeter waves. Int J Infrared Milli Waves 17, 317–331 (1996). https://doi.org/10.1007/BF02088154

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  • DOI: https://doi.org/10.1007/BF02088154

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