1. Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences Changchun 130033 P. R. China
4. Institute of Physics Department of Mechanical Engineering and Mechatronics West Pomeranian University of Technology Szczecin al. Piastow 48 Szczecin 70‐311 Poland