Nanoscale multilayers in porous silicon for THz phonon engineering
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A model predicting the frequency of folded longitudinal acoustic phonon modes in porous silicon based superlattices has been developed. The model includes the measured dependence of the acoustic velocity on porosity and the expected effect of acoustic attenuation on the dispersion relation and on line broadening. We predict that folded phonons with low folding index can be observed with the use of Raman spectroscopy in appropriately designed samples.
|Creators||Aliev, G. N.and Snow, P. A.|
|Departments||Faculty of Science > Physics|
|Additional Information||2008 MRS Fall Meeting. 1-5 December 2008. Boston, United States.|
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