1. College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
2. State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
3. Department of Physics, Jackson State University, Jackson, Mississippi 39217, United States
4. Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
5. Department of Chemistry and Physics, Louisiana State University, Shreveport, Louisiana 71115, United States