1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
2. College of Electronic Science and Technology and college of optoelectronic Engineering
3. Shenzhen University
4. Shenzhen 518060
5. People's Republic of China
6. Institute of Super-Microstructure and Ultrafast Process in Advanced Materials
7. School of Physics and Electronics
8. Central South University
9. Changsha
10. Faculty of Information Technology
11. Macau University of Science and Technology
12. Macao 519020
13. P. R. China