[1] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, POB 912, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Ctr Physicochem Anal & Measurement, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China
[4] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130023, Peoples R China