[Tan, Wenjun; Li, Lin; Wang, Shitan; Gao, Yongli; Liu, Xiaoliang; Gao, YL; Xie, Haipeng; Wang, Can; Niu, Dongmei; Huang, Han; Lyu, Lu; Zhao, Yuan] Cent S Univ, Inst Super Microstruct & Ultrafast Proc Adv Mat, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China.
[Lyu, Lu] Univ Kaiserslautern, Dept Phys, Erwin Schrodinger Str 46, D-67663 Kaiserslautern, Germany.
[Lyu, Lu] Univ Kaiserslautern, Res Ctr OPTIMAS, Erwin Schrodinger Str 46, D-67663 Kaiserslautern, Germany.
[Li, Lin] Cent South Univ Forestry & Technol, Sch Elect & Informat Engn, Changsha 410004, Hunan, Peoples R China.
[Gao, Yongli] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.