1. School of Science
2. Beijing University of Posts and Telecommunications
3. Beijing 100876
4. China
5. State Key Laboratory of Information Photonics and Optical Communications
6. State Key Laboratory of Functional Materials for Informatics
7. Shanghai Institute of Microsystem and Information Technology
8. Chinese Academy of Sciences
9. Shanghai 200050
10. Department of Physics
11. The State University of New York at Potsdam
12. Potsdam
13. USA
14. Beijing National Laboratory for Condensed Matter Physics
15. Institute of Physics
16. Chinese Academy of Science
17. Beijing 100190
18. Center for Optoelectronics Materials and Devices