1. School of Physics and TechnologyWuhan University Wuhan 430072 China
2. Key Laboratory for Micro‐/Nano‐Optoelectronic Devices of Ministry of EducationSchool of Physics and ElectronicsHunan University Changsha 410082 China
3. School of ScienceXi'an Polytechnic University Xi'an 710048 China
4. Institute of Information and Communication TechnologiesElectronics and Applied MathematicsUniversité catholique de Louvain 1348 Louvain‐la‐Neuve Belgium
5. Institute of Optoelectronic DisplayFuzhou University Fuzhou 350002 China