1. Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng, China
2. State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan, China
3. College of Agronomy, Liaocheng University, Liaocheng, China
4. Department of Physics, I3N, University of Aveiro, Aveiro, Portugal