1. Institute of Fundamental and Frontier Sciences; University of Engineering Science and Technology of China; Chengdu China
2. Institute of Fundamental and Frontier Sciences; Department of Physics; Advanced Manufacturing and Materials Processing Institute; University of Engineering Science and Technology, University of North Texas; Chengdu, Denton TX 76203 USA
3. Nanophotonics Center; Electrical and Computer Engineering; Whitacre College of Engineering; Texas Tech University; Lubbock TX 79409-3102 USA