We describe a semiconductor multilayer structure based in acoustic phonon cavities and achievable with MBE technology, designed to display acoustic phonon Bloch oscillations. We show that forward and backscattering Raman spectra give a direct measure of the created phononic Wannier-Stark ladder. We also discuss the use of femtosecond laser impulsions for the generation and direct probe of the induced phonon Bloch oscillations. We propose a gedanken experiment based in an integrated phonon source-structure-detector device, and we present calculations of pump and probe time dependent optical reflectivity that evidence temporal beatings in agreement with the Wannier-Stark ladder energy splitting.
@article{arxiv.cond-mat/0407493,
title = {Phonon Bloch oscillations in acoustic-cavity structures},
author = {N. D. Lanzillotti Kimura and A. Fainstein and B. Jusserand},
journal= {arXiv preprint arXiv:cond-mat/0407493},
year = {2009}
}