@Article{JianWei_etal2007,
author="Jian Wei
and David Olaya
and Boris Karasik
and Sergey Pereverzev
and Andrei Sergeev
and Michael Gershenson",
title="Ultra-sensitive hot-electron nanobolometers for terahertz astrophysics",
journal="ArXiv e-prints",
year="2007",
volume="710",
optkeywords="cond-mat.other; astro-ph; cond-mat.mes-hall",
abstract="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.",
optnote="arXiv:0710.5474v1; 19 pages, 3 color figures",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=407), last updated on Mon, 22 Dec 2008 20:40:10 -0600",
opturl="http://arxiv.org/abs/0710.5474v1",
archivePrefix="arXiv",
eprint="0710.5474v1"
}