1. State Key Laboratory
on Integrated Optoelectronics and College of Electronic
Science and Engineering, Jilin University, Changchun 130012, China
2. College
of Material Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
3. State Key
Laboratory
of Superhard Materials and College of Physics, Jilin University, Changchun 130012, China
4. Department
of Chemistry and Physics, Louisiana State University, Shreveport, Louisiana 71115, United States