1. Key Laboratory of Polar Materials and Devices (MOE) and Department of Electronics, East China Normal University, Shanghai 200062, China
2. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
3. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
4. Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
5. Collaborative Innovation Centre of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China