1. Key laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China
2. State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro‐Nano Optoelectronic Information System School of Science Harbin Institute of Technology Shenzhen 518055 China
3. Key Laboratory for Micro‐Nano Physics and Technology of Hunan Province College of Materials Science and Engineering Hunan University Changsha 410082 China