Title :
Flexural mode dispersion in ultra-thin Ge membranes
Author :
Chavez, E. ; Gomis-Bresco, J. ; Alzina, F. ; Reparaz, J.S. ; Shah, V.A. ; Myronov, M. ; Leadley, D.R. ; Sotomayor Torres, C.M.
Author_Institution :
Catalan Inst. of Nanosci. & Nanotechnol, ICN2, Barcelona, Spain
Abstract :
The effect of the phonon confinement on the acoustic dispersion relation is studied in 60 nm thick free-standing germanium membranes. The detection of phonon modes is observed by Brillouin Light scattering spectroscopy. The quadratic behavior of fundamental flexural wave is detected. The theoretical dispersion relation is also determinate using elastic continuum model.
Keywords :
Brillouin spectra; elastic waves; elemental semiconductors; germanium; membranes; phonon dispersion relations; Brillouin light scattering spectroscopy; Ge; acoustic dispersion relation; elastic continuum model; flexural mode dispersion; flexural wave; germanium ultrathin membranes; phonon confinement; phonon modes; quadratic behavior; size 60 nm; Conductivity; Germanium; Thermal conductivity; Brillouin light scattering spectroscopy; Free-standing germanium membranes;
Conference_Titel :
Ultimate Integration on Silicon (ULIS), 2013 14th International Conference on
Conference_Location :
Coventry
Print_ISBN :
978-1-4673-4800-3
Electronic_ISBN :
978-1-4673-4801-0
DOI :
10.1109/ULIS.2013.6523515
