BRILLOUIN-SCATTERING BY PSEUDOSURFACE ACOUSTIC MODES ON (11BAR1) GAAS

被引：33

作者：

CARLOTTI, G ^{[1
]}

FIORETTO, D ^{[1
]}

GIOVANNINI, L ^{[1
]}

NIZZOLI, F ^{[1
]}

SOCINO, G ^{[1
]}

VERDINI, L ^{[1
]}

机构：

[1] UNIV FERRARA,DIPARTMENTO FIS,UNITA INFM,I-44100 FERRARA,ITALY

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 01期

关键词：

D O I：

10.1088/0953-8984/4/1/036

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the Propagation of pseudosurface acoustic modes on the (11BAR1) 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 (11BAR1) plane of a GaAs crystal. We found a good agreement between the experimental sp ra a d the theoretical cross sections, calculated taking into account both the ripple and the elasto-optic contributions to the scattering process.

引用

页码：257 / 262

页数：6

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