1. State
Key Laboratory of High Power Semiconductor Lasers, School of Science, Changchun University of Science and Technology, 7089 Wei-Xing Road, Changchun 130022, P. R. China
2. Department
of Electrical and Electronic Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, P. R. China
3. Key
Laboratory of Physics and Technology for Advanced Batteries, Ministry
of Education, College of Physics, JilinUniversity, Changchun 130012, P. R. China