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Author |
Jian Wei; David Olaya; Boris Karasik; Sergey Pereverzev; Andrei Sergeev; Michael Gershenson |
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Title |
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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RPLAB @ s @ |
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407 |
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Author |
Andreev, A. F. |
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Title |
The thermal conductivity of the intermediate state in superconductors |
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Journal Article |
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1964 |
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Sov. Phys. JETP |
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Sov. Phys. JETP |
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19 |
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5 |
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1228-1231 |
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superconductors, intermediate state, thermal conductivity |
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It is shown that, owing to over-the-barrier reflection of electron excitations at the boundary of the normal and superconducting phases, a temperature drop occurs when there is a flow of heat. The additional thermal resistance of a superconductor in the intermediate state is calculated. It is shown that it increases exponentially as the temperature is lowered and does not depend on the electron mean free path. |
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MSPU @ s @ Andreev_reflection |
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216 |
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Arams, F.; Allen, C.; Peyton, B.; Sard, E. |
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Millimeter mixing and detection in bulk InSb |
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1966 |
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Proc. IEEE |
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54 |
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4 |
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612-622 |
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InSb, mixer, detector |
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219 |
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Tucker, J. R. |
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Quantum limited detection in tunnel junction mixers |
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1979 |
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IEEE J. Quantum Electron. |
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15 |
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11 |
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1234-1258 |
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sis_Tucker_1979 |
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223 |
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Author |
Гершензон, Е. М.; Гершензон, М. Е.; Гольцман, Г. Н.; Семенов, А. Д.; Сергеев, А. В. |
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Title |
Неселективное воздействие электромагнитного излучения на сверхпроводящую пленку в резистивном состоянии |
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1982 |
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Письма в ЖЭТФ |
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Письма в ЖЭТФ |
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36 |
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7 |
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241-244 |
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russian |
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Duplicated as 1717 |
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MSPU @ s @ |
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225 |
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