Year: 2005
Type: article
Abstract: We describe a semiconductor multilayer structure based in acoustic-phonon cavities and achievable with molecular beam epitaxy 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.
Source: Physical Review B
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2068796435