1. College of Physics Sichuan University Chengdu 610064 China
2. Department of Physics Tsinghua University Beijing 100084 China
3. Institute for Micro and Nanotechnologies MacroNano(R) and Institute for Materials Science and Engineering Chair of Materials for Electrical Engineering and Electronics Technische Universität Ilmenau 98693 Ilmenau Germany
4. Competence Center for Micro‐ and Nanotechnologies Leibniz Institute of Photonic Technology Jena (IPHT) 07745 Jena Germany
5. Key Laboratory of High Energy Density Physics and Technology of Ministry of Education Sichuan University Chengdu 610065 China