[1] Tsinghua Univ, Key Lab Photon Control Technol, Minist Educ, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Precis Instrument, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China
[3] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China