[Zhou, Haiqing; Chen, Shuo; Chen, S; Ren, Zhifeng; Zhu, Qing; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Zhou, Haiqing; Chen, Shuo; Chen, S; Ren, Zhifeng; Zhu, Qing; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.
[Zhou, Haiqing; Yu, Fang] Hunan Normal Univ, Sch Phys & Elect, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
[Qin, Fan; Bao, Jiming; Yu, Luo] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
[Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.