1. Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Nanostructure and Nanotechnology; CAS Research/Education Center for Excellence in Molecule Science; Institute of Chemistry; Chinese Academy of Science; Beijing 100190 China
2. Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics; Peking University; Beijing 100871 China
3. University of the Chinese Academy of Sciences; Beijing 100049 China
4. State Key Laboratory of Infrared Physics; Shanghai Institute of Technical Physics; Chinese Academy of Sciences; Shanghai 200083 China
5. Key Laboratory of Polar Materials and Devices (MOE); East China Normal University; Shanghai 200241 China
6. National Synchrotron Radiation Laboratory; University of Science and Technology of China; Hefei 230026 China
7. State Key Laboratory of Precision Measuring Technology and Instruments; Tianjin University; Tianjin 300072 China
8. College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China