1. The Beijing Municipal Key Laboratory of New Energy Materials and TechnologiesSchool of Materials Sciences and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P. R. China
2. Anhui Key Laboratory of Optoelectric Materials Science and TechnologyKey Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Normal University Wuhu Anhui 241000 P. R. China
3. Institute of Microstructure and Property of Advanced MaterialsBeijing University of Technology Beijing 100124 P. R. China
4. Laboratory of Crystal PhysicsKirensky Institute of PhysicsFederal Research Center KSC SB RAS Krasnoyarsk 660036 Russia
5. Department of Engineering Physics and RadioelectronicsSiberian Federal University Krasnoyarsk 660041 Russia
6. Department of PhysicsFar Eastern State Transport University Khabarovsk 680021 Russia
7. National Synchrotron Radiation Research Center Hsinchu 300 Taiwan
8. State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology Guangzhou 510641 P. R. China