Affiliation: | a Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, PR China b Graduate School of Chinese Academy of Sciences, Beijing 100049, PR China c Key Laboratory of Advanced Photonic and Electronic Materials, and Department of Physics, Nanjing University, Nanjing 210093, PR China d Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215125, PR China |