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SRON-TELIS |
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2007 |
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RPLAB @ s @ TELIS_proj |
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405 |
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Author |
Jian Wei; David Olaya; Boris Karasik; Sergey Pereverzev; Andrei Sergeev; Michael Gershenson |
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Ultra-sensitive hot-electron nanobolometers for terahertz astrophysics |
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Journal Article |
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2007 |
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ArXiv e-prints |
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710 |
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cond-mat.other; astro-ph; cond-mat.mes-hall |
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The background-limited spectral imaging of the early Universe requires spaceborne terahertz (THz) detectors with the sensitivity 2-3 orders of magnitude better than that of the state-of-the-art bolometers. To realize this sensitivity without sacrificing operating speed, novel detector designs should combine an ultrasmall heat capacity of a sensor with its unique thermal isolation. Quantum effects in thermal transport at nanoscale put strong limitations on the further improvement of traditional membrane-supported bolometers. Here we demonstrate an innovative approach by developing superconducting hot-electron nanobolometers in which the electrons are cooled only due to a weak electron-phonon interaction. At T<0.1K, the electron-phonon thermal conductance in these nanodevices becomes less than one percent of the quantum of thermal conductance. The hot-electron nanobolometers, sufficiently sensitive for registering single THz photons, are very promising for submillimeter astronomy and other applications based on quantum calorimetry and photon counting. |
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arXiv:0710.5474v1; 19 pages, 3 color figures |
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407 |
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Борн, М.; Вольф, Э. |
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Основы оптики |
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1973 |
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Наука |
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М. |
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russian |
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227 |
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Tinkham, Mikhael |
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Introduction to superconductivity |
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1996 |
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McGraw-Hill |
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superconductivity, BCS, GL |
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USA |
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2 |
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no |
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896 |
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Kardashev, N. S.; Andreyanov, V. V.; Buyakas, V. I.; Vinogradov, I. S.; Gvamichava, A. S.; Kotik, A. I.; Kurt, V. G.; Lazareva, G. S.; Mironova, E. N.; Myshonkova, N. V.; Slysh, V. I.; Trubnikov, A. G.; Troitskiy, V. F.; Puryaev, D. T.; Usyukin, V. I. |
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The Millimetron project |
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2000 |
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Proc. Lebedev Phys. Institute |
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228 |
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RPLAB @ s @ MILLIMETRON_first |
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308 |
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