1. Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2. Light, nanomaterials, nanotechnologies (L2n), Université de Technologie de Troyes and CNRS ERL 7004, 10004 Troyes, France
3. Harbin Institute of Technology, Harbin 150001, China
4. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
5. Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen 518055, China