[1] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China
[4] Anhui Prov Key Lab Photon Devices & Mat, Hefei 230031, Peoples R China