1. State Key Laboratory of High Power Semiconductor Lasers
2. Changchun University of Science and Technology
3. Changchun 130022
4. China
5. State Key Laboratory for Chemo/Biosensing and Chemometrics
6. School of Physics and Electronics
7. Hunan University
8. Changsha 410082
9. Department of Materials Science and Engineering
10. City University of Hong Kong
11. Hong Kong SAR 999077