1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
2. Key Laboratory of Information Storage System Ministry of Education of China, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
3. Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, Guangdong 518057, China