1. Shenzhen Pinghu Laboratory 1 , 2 Laolang Road, Shenzhen 518111, China
2. School of Electrical and Electronic Engineering, Nanyang Technological University 2 , 50 Nanyang Avenue, 639798 Singapore
3. Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, and School of Physics and Electronic Engineering, Hainan Normal University 3 , No. 99 Longkun Road, Haikou 571158, China
4. Temasek Laboratories, Nanyang Technological University 4 , 50 Nanyang Drive, 637553 Singapore