1. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education
2. College of Nuclear Science and Technology
3. Beijing Normal University
4. Beijing 100875
5. P. R. China
6. School of Materials Science and Engineering and National Insititute for Advanced Materials
7. NanKai University
8. Tianjin 300350
9. School of Optoelectronic Science and Engineering & Key Lab of Modern Optical Technologies of Education Ministry of China
10. Soochow University
11. Suzhou 215006