Non-equilibrium phonon generation and detection in microstructure devices

作者：Hertzberg J B^*; Otelaja O O; Yoshida N J; Robinson R D

来源：Review of Scientific Instruments, 2011, 82(10): 104905.

DOI：10.1063/1.3652979

We demonstrate a method to excite locally a controllable, non-thermal distribution of acoustic phonon modes ranging from 0 to similar to 200 GHz in a silicon microstructure, by decay of excited quasiparticle states in an attached superconducting tunnel junction (STJ). The phonons transiting the structure ballistically are detected by a second STJ, allowing comparison of direct with indirect transport pathways. This method may be applied to study how different phonon modes contribute to the thermal conductivity of nanostructures.

• 出版日期2011-10