1. Tianjin
Key Laboratory for optoelectronic Materials and Devices, Key Laboratory
of Display Materials and Photoelectric Devices, Ministry of Education,
Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China
2. Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China
3. Department
of Materials Science and Engineering, Rutgers, The State University of New Jersey, 607 Taylor Road, Piscataway, New Jersey 08854, United States