Affiliation: | 1. College of Advanced Science and Technology and School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China;3. Department of Physics, University of Puerto Rico, San Juan, Puerto Rico 00923;4. Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00923 |