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Gex Si1-x/Si超晶格中纵声学声子的喇曼散射强度研究
Investigation on the Raman Scattering Intensity of Longitudinal Acoustic phonons in Gex Si1-x /Si Superlattices
【摘要】 本文用光弹理论,在全面考虑了超晶格中两种材料的声速,质量密度和光弹常数存在差别的基础上,计算了GexSi1-x/Si超晶格中折迭纵声学声子的喇曼散射强度,在高达50cm-1的频率范围内,理论值和实验符合得很好。
【Abstract】 We have investigated the Raman scattering intensity of the folded longitudinal acoustic phonons in Gex Si1-x / Si superlattices with photoelastic mechanism, taking into account the differences between the acoustic and photoelastic parameters of component materials. The theoretical results fitted the experiments with good precision up to about 50cm-1.
【关键词】 应变层超晶格;
喇曼散射;
折迭声学声子;
光弹理论;
【Key words】 Strained layer superlattices; Raman scattering; Folded acoustic phonons; photoelastic mechanism;
【Key words】 Strained layer superlattices; Raman scattering; Folded acoustic phonons; photoelastic mechanism;
- 【文献出处】 光散射学报 ,Chinese Journal of Light Scattering , 编辑部邮箱 ,1991年Z1期
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