1. Key Laboratory of Material Physics of Ministry of Education
2. School of Physics and Engineering
3. Zhengzhou University
4. Zhengzhou 450052
5. China
6. Pillar of Engineering Product Development
7. Singapore University of Technology and Design
8. Singapore
9. SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
10. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province