[1] Shandong Normal Univ, Sch Phys & Elect, Shandong Prov Key Lab Opt & Photon Devices, Jinan 250014, Peoples R China
[2] Shandong Univ Technol, Sch Phys & Optoelect Engn, Zibo 255049, Peoples R China
[3] Shandong Normal Univ, Ctr Light Manipulat & Applicat, Sch Phys & Elect, Jinan 250014, Peoples R China