1. Fujian Engineering Research Center for Solid-State Lighting, Department of Electronic Science, Xiamen University, Xiamen 361005, China
2. Department of Photonics and Graduate Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
3. National Integrated Circuit Industry and Education Integration Innovation Platform, Department of Electronic Science, Xiamen University, Xiamen 361005, China