[Fan, Dianyuan; Li, Ying; Zhang, Lifu; Conti, Claudio; Wang, Zhiteng; Huang, Pengwei] Shenzhen Univ, Coll Optoelect Engn,Key Lab Optoelect Devices & S, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Collaborat Lab 2D Mat Optoelectron Sci & Technol, Shenzhen 518060, Peoples R China.
[Zhang, Lifu; Wang, Zhiteng] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
[Conti, Claudio] CNR, ISC, Via Taurini 19, I-00185 Rome, Italy.
[Conti, Claudio] Univ Sapienza, Dept Phys, Piazzale Aldo Moro 5, I-00185 Rome, Italy.
[Hu, Yonghua] Hunan Univ Sci & Technol, Sch Comp Sci & Engn, Xiangtan 411201, Peoples R China.