1. School of Physics, Henan Normal University, Xinxiang 453007, China
2. College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang 453007, China
3. Henan Key Laboratory of Optoelectronic Sensing Integrated Application, Xinxiang 453007, China
4. Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
5. Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, United States