1. School of Physics, Central South University, Changsha, 410083, P. R. China
2. School of Physics and Electronics, Nanning Normal University, Nanning, 530001, P. R. China
3. School of Physics and Electronics, Hunan Normal University, Changsha, 410083, P. R. China
4. Division Microrobotics and Control Engineering, Department of Computing Science, University of Oldenburg, D-26129, Oldenburg, Germany
5. School of Advanced Manufacturing, Sun-Yat-sen University, Shenzhen, 518107, P. R. China