摘要
<正>近年来通过制备硅基Ⅲ-Ⅴ族半导体激光器以实现高性能硅基光源的研究备受人们关注。在Si衬底上外延生长Ⅲ-Ⅴ族激光器材料的方法易于实现Ⅲ-Ⅴ族材料与Si衬底的大面积集成,因而成为一条很有希望的技术途径。由于Ⅲ-Ⅴ族材料与Si衬底的大晶格失配、界面极性差异和热膨胀系数差异,外延层中的失配位错、反相畴错等缺陷很难完全避免;而量子点材料对位错的敏感度较低,因此
引文
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