The authors have studied the propagation of pseudosurface acoustic modes on the (11(mean)1) plane of GaAs. From a calculation of the surface density of phonon states, two resonances are found in the continuum of modes, corresponding to the pseudosurface acoustic modes, called PSM and HFPSM. Experimental evidence for these modes is given by Brillouin spectra taken for different directions on the (11(mean)1) plane of a GaAs crystal. They found a good agreement between the experimental spectra and the theoretical cross sections, calculated taking into account both the ripple and the elasto-optic contributions to the scattering process.
Brillouin scattering by pseudosurface acoustic modes on (1-11) GaAs
GIOVANNINI, Loris;NIZZOLI, Fabrizio;
1992
Abstract
The authors have studied the propagation of pseudosurface acoustic modes on the (11(mean)1) plane of GaAs. From a calculation of the surface density of phonon states, two resonances are found in the continuum of modes, corresponding to the pseudosurface acoustic modes, called PSM and HFPSM. Experimental evidence for these modes is given by Brillouin spectra taken for different directions on the (11(mean)1) plane of a GaAs crystal. They found a good agreement between the experimental spectra and the theoretical cross sections, calculated taking into account both the ripple and the elasto-optic contributions to the scattering process.File in questo prodotto:
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