1. Physics DepartmentSchool of ScienceTianjin University of Science & TechnologyTianjin300457People's Republic of China
2. School of Material Science and Chemical EngineeringTianjin University of Science & TechnologyTianjin300457People's Republic of China
3. The Key Laboratory of Weak Light Nonlinear PhotonicsMinistry of EducationNankai UniversityTianjin300457People's Republic of China