1. Department of Electrical Engineering and Computer Science
2. Ningbo University
3. Ningbo
4. P. R. China
5. National Laboratory of Solid State Microstructures
6. Laboratory of Optoelectronic Materials and Detection Technology
7. Guangxi Key Laboratory for Relativistic Astrophysics
8. Department of Physical Science and Technology
9. Guangxi University
10. Nanning
11. Collaborative Innovation Center of Advanced Microstructures
12. Department of Electronic Science and Engineering
13. Nanjing University
14. Nanjing
15. Materials Sciences Division
16. Lawrence Berkeley National Laboratory
17. Berkeley
18. USA