1. School of Materials Science and Engineering
2. Harbin Institute of Technology
3. Harbin 150001
4. China
5. Key Laboratory for Photonic and Electric Band gap Materials
6. School of Physics and Optoelectronic Engineering
7. Dalian University of Technology
8. Dalian 116024
9. EpiTop Optoelectronic Co., Ltd.
10. Pingxiang 337000