Affiliation: | a School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singaporeb Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, Chinac Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, Chinad School of Information Science and Engineering, Shandong University, Jinan, 250100, China |