Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5010379 | Solid-State Electronics | 2017 | 7 Pages |
Abstract
The optical response of strained SiGe alloys, as well as thin Si layers, is analyzed using a sp3d5sâ tight-binding model within the independent particle approximation. The theoretical results are compared to measurements obtained on samples with various Ge content and layer thicknesses. The dielectric function is extracted from spectroscopic ellipsometry allowing a separation of its real and imaginary parts. Theory and simulation show similar trends for the variation of the dielectric function of SiGe with varying Ge content. Variations are also well reproduced for thin Si layers with varying thickness and are attributed to quantum confinement.
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Authors
C. Kriso, F. Triozon, C. Delerue, L. Schneider, F. Abbate, E. Nolot, D. Rideau, Y.-M. Niquet, G. Mugny, C. Tavernier,