1. School of Materials Science and Engineering Beihang University Xueyuan road 37 Beijing 100191 China
2. Tianmushan Laboratory Xixi Octagon City, Yuhang District Hangzhou 310023 China
3. Max Planck Institute of Quantum Optics Hans Kopfermann Strasse 1 85748 Munich Germany
4. Depertment of Physics Ludwig‐Maximilians‐Universität München Am Coulombwall 1 85748 Garching Germany
5. GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 1 64291 Darmstadt Germany
6. Department of Mechanical Engineering Toyohashi University of Technology 1‐1 Tempaku‐cho Toyohashi 441–8580 Japan
7. Department of Earth and Environmental Sciences Ludwig‐Maximilians‐Universität München Theresienstrasse 41 80333 Munich Germany