1. School of Physical Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252059, China
2. State Key Laboratory of Superhard Materials and Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
3. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, USA
4. School of Physics and Electronic Engineering, Linyi University, Linyi 276005, China
5. Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, China