Thermal conductance and electron-phonon coupling in mechanically suspended nanos

2019-12-20 11:02:04

thermal electron GaAs phonon suspended

责任者: Yung, C.S.;Schmidt, D.R.;Cleland, A.N. 单位: Dept. of Phys. & iQUEST, Univ. of California, Santa Barbara, CA, USA 来源出处: Applied Physics Letters(Appl. Phys. Lett. (USA)),2002/07/01,81(1):31-3 摘要: We have fabricated and characterized the principal thermal properties of a mechanically suspended nanostructure, consisting of a micron-scale suspended GaAs island, upon which we have defined superconductor-insulator-normal metal tunnel junctions. The tunnel junctions allow for sensitive thermometry and heating of the electrons in a thermally isolated normal metal element, permitting the determination of the low-temperature thermal conductance of the legs that support the GaAs island, as well as the low-temperature electron-phonon coupling. This device forms the basis of a nanoscale bolometric detector, whose optical performance can be estimated from these measurements 关键词: bolometers;electron-phonon interactions;gallium arsenide;III-V semiconductors;nanostructured materials;nanotechnology;temperature measurement;thermal conductivity;thermal conductivity measurement;electron-phonon coupling;mechanically suspended nanostructures;thermal conductance;micron-scale suspended GaAs island;superconductor-insulator-normal metal tunnel junctions;thermometry;nanoscale bolometric detector;GaAs