[1] Ningbo Univ, Res Inst Adv Technol, Lab Infrared Mat & Devices, Ningbo 315211, Zhejiang, Peoples R China
[2] Ningbo Univ, Key Lab Photoelect Detect Mat & Devices Zhejiang, Ningbo 315211, Zhejiang, Peoples R China
[3] Ningbo Univ, Fac Sci, Ningbo 315211, Zhejiang, Peoples R China
[4] Univ Rennes 1, CNRS, Lab Glasses & Ceram, UMR 6226, F-135042 Rennes, France
[5] Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117551, Singapore