1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou Gansu 730050 P. R. China
2. Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013 Taiwan
3. Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu 30013 Taiwan
4. Department of Physics National Sun Yat‐Sen University Kaohsiung 80424 Taiwan
5. School of Materials Science and Engineering National Institute for Advanced Materials Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
6. Zibo Institute of Measurement Technology Zibo 255020 P. R. China
7. Foshan Flex Photonics Co. Ltd Foshan 528299 P. R. China
8. Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices School of Chemistry Biology and Materials Science East China University of Technology Nanchang Jiangxi 330013 P. R. China