1. National Key Laboratory of Science
and Technology on Tunable Laser, Institute of Opto-electronics, Harbin Insitute of Technology, Harbin, 150080, China
2. College of Foundation Science, Harbin University of Commerce, Harbin, 150028, China
3. Tianjin Key Laboratory of Optical
Thin Films, Tianjin Jinhang Institute of Technical Physics, Tianjin 300192, China