Stimulated Brillouin scattering in layered media: nanoscale enhancement of silicon

被引：1
|
作者：
Smith, M. J. A. [1 ,2 ]
Wolff, C. [3 ]
Poulton, C. G. [2 ]
de Sterke, C. Martijn [1 ]
机构：
[1] Univ Sydney, Sch Phys, IPOS, Sydney, NSW 2006, Australia
[2] Univ Technol Sydney, Sch Math & Phys Sci, Sydney, NSW 2007, Australia
[3] Univ Southern Denmark, Ctr Nano Opt, Campusvej 55, DK-5230 Odense M, Denmark
来源：
OPTICS LETTERS | 2019年 / 44卷 / 06期
基金：
欧盟地平线“2020”; 澳大利亚研究理事会;
关键词：
D O I：
10.1364/OL.44.001407
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report a theoretical study of stimulated Brillouin scattering (SBS) in general anisotropic media, incorporating the effects of both acoustic strain and local rotation. We apply our general theoretical framework to compute the SBS gain for layered media with periodic length scales smaller than all optical and acoustic wavelengths, where such composites behave like homogeneous anisotropic media. We predict that a layered medium composing nanometer-thin layers of silicon and As2S3 glass has a bulk SBS gain of 1.28 x 10(-9)W(-1 )m. This is more than 500 times larger than that of silicon and almost double the gain of As2S3. The enhancement is due to a combination of roto-optic, photoelastic, and artificial photoelastic contributions in the composite structure. (C) 2019 Optical Society of America
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页码：1407 / 1410
页数：4
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