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Abstract: We consider the current status of research in the development of a submillimeter and far-infrared receiving instrument and propose promising solutions for the receivers of the spaceborne telescope “Millimetron,” which allow one to realize comprehensively the opportunities given by this international project administrated by the Astrospace Center of the P. N. Lebedev Physical Institute of the Russian Academy of Sciences.
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Abstract: The authors present a fabrication technique of superconducting single photon detectors made by local oxidation of niobium nitride ultrathin films. Narrow superconducting meander lines are obtained by direct writing of insulating niobium oxynitride lines through the films using voltage-biased tip of an atomic force microscope. Due to the 30nm resolution of the lithographic technique, the filling factor of the meander line can be made substantially higher than detector of similar geometry made by electron beam lithography, thus leading to increased quantum efficiency. Single photon detection regime of these devices is demonstrated at 4.2K.
The authors thank J.-P. Maneval for stimulating discussions. This work has been partly supported by ACI Nanoscience from French Ministry of Research, D.G.A., by Grant No. 02.445.11.7434 of Russian Ministry of Education and Science, and by the European Commission under project “SINPHONIA,” Contract No. NMP4-CT-2005-16433.
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Kardashev, N. S., Andreyanov, V. V., Gromov, V. D., Buyakas, V. I., Gvamichava, A. S., Kotik, A. N., et al. (2007). The Millimetron project. In N. S. Kardashev, & S. A. Dagkesamanskii (Eds.), Radioastronomical Tools and Techniques (111).
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Buyakas, V. I., & Rybakova, A. G. (2007). The Millimetron project: the unit of high-precision deployment of a space mirror. In N. S. Kardashev, & S. A. Dagkesamanskii (Eds.), Radioastronomical Tools and Techniques (127).
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