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Electron-Phonon
Interactions at milli-Kelvin Temperatures and
Ultra-Sensitive Detectors of Far-IR Radiation
Understanding
of the electron-phonon interaction in disordered and low-dimensional
conductors is crucial for both fundamental research and electronic device
applications. We carry out systematic measurements of the electron-phonon
scattering time in thin-film metal structures by means of hot-electron
experiments at milli-Kelvin temperatures. The
applied aspects of this research involve the development of ultra-sensitive
hot-electron detectors of submillimeter and
far-infra-red electromagnetic radiation for the deep-space NASA missions (in
collaboration with the JePropulsion Lab).
Selected Publications:
J. Wei,
D. Olaya, B.S. Karasik,
S.V. Pereverzev, A.V. Sergeev,
and M.E. Gershenson, “Ultra-Sensitive Hot-Electron Nanobolometers
for Terahertz Astrophysics”, Nature Nanotechnology 3, 496-500 (2008).
B. S. Karasik,
A. V. Sergeyev, D. Olaya, J. Wei, M. E. Gershenson,
J. H. Kawamura, and W. R. McGrath, “A Photon Counting
Hot-Electron Bolometer for Space THz Spectroscopy” Proc. 16th Int.Symp. on Space Terahertz Technol., May 2-4, 2005,
Gothenburg, Sweden, pp. 543-548
A. V. Sergeev,
V. V. Mitin, B. S. Karasik, and M. E. Gershenson, Superconducting nanosensors with mesoscopic
number of quasiparticles, Physica E 19, 173-177
(2003).
M. E. Gershenson,
D. Gong, T. Sato, B. S. Karasik,
and A. V. Sergeev. Millisecond
electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures. Appl. Phys. Lett.
79, 2049 (2001).
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