Brillouin scattering studies of surface acoustic waves in SiC

被引：2

作者：

Andrews, GT ^{[1
]}

Clouter, MJ

Mroz, B

Shishkin, Y

Ke, Y

Devaty, RP

Choyke, WJ

机构：

[1] Mem Univ St Johns, Dept Phys, St Johns, NF, Canada

[2] Adam Mickiewicz Univ Poznan, Dept Phys, Poznan, Poland

[3] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

SILICON CARBIDE AND RELATED MATERIALS 2003, PRTS 1 AND 2 | 2004年 / 457-460卷

关键词：

porous silicon carbide; Brillouin scattering; surface acoustic waves;

D O I：

10.4028/www.scientific.net/MSF.457-460.653

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Brillouin spectra due to thermally excited surface ripples (Rayleigh waves) have been observed on both porous and non-porous 6H SiC after deposition of aluminium coatings varying in thickness from 20 nm to 70 nm. The spectra were obtained at room temperature in a back-scattering geometry using a tandem Fabry-Perot spectrometer with a probe wavelength of 532 nm. The incident beam power was normally less than 50 mW in a focal-spot area of approximately 50 mum. Data were typically obtained for a series of incident angles varying from 20degrees to 80degrees. The surface wave velocity for the (1 (2) over bar 10) face of the non-porous material was 6000+/-200 m/s. The corresponding velocities for the (0001) face of the porous samples were in the range from 2400+/-100 m/s to 2850+/-50 m/s.

引用

页码：653 / 656

页数：4