[Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
[McElhenny, Brian; Chen, Shuo; Yu, Luo; Song, Shaowei; Wang, Dezhi; Ren, Zhifeng; Zhu, Qing] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[McElhenny, Brian; Chen, Shuo; Yu, Luo; Song, Shaowei; Wang, Dezhi; Ren, Zhifeng; Zhu, Qing] Univ Houston, TcSUH, Houston, TX 77204 USA.
[Song, Shaowei; Zhu, Qing] Univ Houston, Mat Sci & Engn Program, Houston, TX 77204 USA.
[Qin, Zhaojun; Bao, Jiming; Wu, Chunzheng] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.