1. Department of Electronic Engineering, Optoelectronics Engineering Research Center, School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, Fujian, China
2. Université Côte d’Azur, CNRS-CRHEA Centre de Recherche sur L’Hétéro-Epitaxie et ses Applications-Centre National de la Recherche Scientifique, Valbonne 06560, France