1. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
2. Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
3. College of Science, Shijiazhuang University, Shijiazhuang, Hebei 050035, P. R. China
4. Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center, Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing, School of Mathematics and Physics Science and Engineering, Hebei University of Engineering, Hebei, Handan 056038, P. R. China