1. School of Optical and Electronic Information
2. Huazhong University of Science and Technology
3. Wuhan
4. P. R. China
5. School of Physics, Communication and Electronics
6. Department of Chemistry and Biochemistry
7. University of Maryland
8. College Park
9. USA
10. Engineering Research Centre for Functional Ceramics, Ministry of Education
11. Institute of Acoustics
12. Chinese Academy of Sciences
13. Beijing 100190