1. School of Materials Science and Engineering, School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, China
2. Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
3. School of Optoelectronic Engineering & CQUPT-BUL Innovation Institute, Chongqing University of Posts and Telecommunications, Chongqing, China
4. Institute of Physics, University of Tartu, Tartu, Estonia
5. Faculty of Science and Technology, Jan Długosz University, Częstochowa, Poland
6. Academy of Romanian Scientists, Bucharest, Romania