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. School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518172 P. R. China
3. Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering Tianjin University Tianjin 300072 China
4. Department of Opto-electronic Information Science School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001, 100088 P. R. China
5. State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous Metals Beijing 100088 P. R. China