Determination of Photoelastic Constant Ratio of the Two Components in GexSi1-x/Si Superlattice
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Abstract
From the intensity ratio of the folded longitudinal acoustic phonons with re-spect to the longitudinal acoustic phonon in a Ge0.51Si0.49/Si superlattice (SL),we obtained a photoelastic constant. ratio of 6.6 for Ge0.51Si0.49 alloy with re-spect to Si in the SL at wavelength 5145Å, which is 2.6 times greater than that obtainedby He Phys.Rev. B39(1989) 5919 in a Ge0.51Si0.49/Si SL.
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