1. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
4. Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China