[1] China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing 102249, Peoples R China
[2] China Univ Petr, Lab Opt Sensing & Detecting Technol, Beijing 102249, Peoples R China
[3] China Univ Petr, Dept Math & Phys, Beijing 102249, Peoples R China
[4] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China