Non-equilibrium phonon generation and detection in microstructure devices

J. B. Hertzberg, O. O. Otelaja, N. J. Yoshida, R. D. Robinson

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We demonstrate a method to excite locally a controllable, non-thermal distribution of acoustic phonon modes ranging from 0 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. © 2011 American Institute of Physics.
Original languageEnglish (US)
Pages (from-to)104905
JournalReview of Scientific Instruments
Issue number10
StatePublished - Nov 2 2011
Externally publishedYes


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