1. School of Physics, Beihang University, Beijing 100191, China
2. Department of Physics, Material Science and Engineering Program, Department of Electrical, Computer, & Energy Engineering, and Liquid Crystal Materials Research Center, University of Colorado, Boulder, Colorado 80309, United States
3. Department of Physics, Cornell University, Ithaca, New York 14850, United States
4. Physics Department, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia
5. Key Laboratory of Intelligent Systems and Equipment Electromagnetic Environment Effect, School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
6. Renewable and Sustainable Energy Institute, National Renewable Energy Laboratory and University of Colorado, Boulder, Colorado 80309, United States