1. Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai University Tianjin 300350 P. R. China
2. Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials College of Physics and Energy Fujian Normal University Fuzhou 350007 P. R. China
3. The MOE Key Laboratory of Weak‐Light Nonlinear Photonics School of Physics Nankai University Tianjin 300071 P. R. China
4. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 P. R. China