1. State Key Laboratory for Mesoscopic Physics and School of PhysicsPeking UniversityCollaborative Innovation Center of Quantum Matter Beijing 100871 P. R. China
2. Collaborative Innovation Center of Extreme OpticsShanxi University Taiyuan Shanxi 030006 P. R. China
3. State Key Laboratory on Tunable Laser TechnologyMinistry of Industry and Information Technology Key Lab of Micro‐Nano Optoelectronic Information SystemShenzhen Graduate SchoolHarbin Institute of Technology Shenzhen 518055 P. R. China