1. College of Materials Science and Engineering, Institute of Microelectronics (IME), Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, China
2. Faculty of Engineering and Environment, Northumbria University, Newcastle, U.K
3. Dongguan Sino Nitride Semiconductor Company Ltd., Dongguan, China
4. Information Technology Research Institute and the Shenzhen Institute of Information Technology, Shenzhen, China