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Selective area growth of germanium and silicon-germanium in silicon waveguides for on-chip optical interconnect applications

机译:片上光互连应用中硅波导中锗和硅锗的选择性面积增长

摘要

A robust fabrication process for selective area growth of semiconductors in growth windows is provided. Sidewall growth is eliminated by the presence of a spacer layer which covers the sidewalls. Undesirable exposure of the top corners of the growth windows is prevented by undercutting the growth window prior to deposition of the dielectric spacer layer. The effectiveness of this process has been demonstrated by selective-area growth of Ge and Ge/SiGe quantum wells on a silicon substrate. Integration of active optoelectronic devices with waveguide layers via end-coupling through the dielectric spacer layer can be reliably accomplished in this manner.
机译:提供了用于在生长窗口中选择性地生长半导体的稳健的制造工艺。通过覆盖侧壁的隔离层可以消除侧壁的生长。通过在沉积介电间隔层之前对生长窗口进行底切,可以防止生长窗口的顶角暴露在不希望的地方。通过在硅衬底上选择性生长Ge和Ge / SiGe量子阱,证明了该工艺的有效性。以这种方式可以可靠地实现有源光电器件与波导层之间通过介电间隔层的端耦合的集成。

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