[1] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
[3] Tsinghua Univ, Ctr Atom & Mol Nanosci, Beijing 100084, Peoples R China
[4] Shanghai Jiao Tong Univ, Key Lab Laser Plasmas, Minist Educ, Shanghai 200240, Peoples R China
[5] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China