1. Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 P. R. China
2. State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra‐Intense Laser Science Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 P. R. China
3. School of Materials Science and Engineering East China University of Science and Technology Shanghai 201800 P. R. China