1. Key Lab of Microsystem and Microstructure of Ministry of Education
2. Harbin Institute of Technology
3. Harbin 150080
4. China
5. Department of Physics
6. School of Physical Electronics
7. Center for Public Security Information and Equipment Integration Technology
8. University of Electronic Science and Technology of China
9. Chengdu
10. P. R. China
11. Key Laboratory of Organic Solids