1. Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China
2. Laboratoire Ondes et Matière d'Aquitaine CNRS University of Bordeaux Talence F‐33400 France
3. Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Beijing 100124 P. R. China
4. Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China