1. State Key Laboratory on Tunable Laser Technology; Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System; Shenzhen Graduate School; Harbin Institute of Technology; Shenzhen 518055 China
2. Department of Engineering Science and Physics; College of Staten Island; CUNY; Staten Island NY 10314 USA
3. The Graduate Center; CUNY; New York NY 10016 USA