1. College of Materials Science and Engineering, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen Key Laboratory of Special Functional Materials, Chinese Engineering and Research Institute of Microelectronics, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, 3688 Nanhai Ave., Shenzhen 518060, People's Republic of China
2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, 3688 Nanhai Ave., Shenzhen 518060, People's Republic of China
3. The Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Tokyo 113-0032, Japan