Author Affiliations

Jingxian Cui,^a,* Dinusha Serandi Gunawardena,^a Zhengyong Liu,^a,b and Hwa-Yaw Tam^a

^aPhotonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China

^bKey Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China

^*Corresponding author: jingxian.cui@connect.polyu.hk