1. Key Laboratory
of In-Fiber Integrated Optics, Ministry of Education, and College
of Science, Harbin Engineering University, Harbin 150001, China
2. Key Laboratory for Photonic and Electronic Bandgap Materials,
Ministry of Education, and School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
3. Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
4. College of Material Science and Chemical
Engineering, Harbin Engineering University, Harbin 150001, China