1. School of Physics and Electronic Engineering
2. Xinyang Normal University
3. Xinyang 464000
4. P. R. China
5. Key Laboratory of Microelectronic and Energy of Henan Province
6. College of Chemistry and Chemical Engineering
7. Luoyang Normal University
8. Luoyang 471934
9. Department of Mechanical and Aerospace Engineering
10. Hong Kong University of Science and Technology
11. Kowloon