1. Optics & Thermal Radiation Research Center, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong266237, China
2. Center for Optics Research and Engineering, Shandong University, Qingdao266237, China
3. Key Laboratory of Laser & Infrared System (Shandong University), Ministry of Education, Shandong University, Qingdao266237, China
4. School of Energy and Power Engineering, Shandong University, Jinan, Shandong250061, China
5. Institute of Novel Semiconductors, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong250100, China