1. State Key Laboratory of Functional Materials for Informatics
2. Shanghai Institute of Micro-System and Information Technology
3. Chinese Academy of Sciences
4. Shanghai 200050
5. People's Republic of China
6. International Laboratory of Quantum Functional Materials of Henan
7. School of Physics and Engineering
8. Zhengzhou University
9. Zhengzhou 450001
10. China
11. Hangzhou Dianzi Univ.
12. Coll Mat & Environm Engn
13. Hangzhou