1. School of Electronics and Information Technology (School of Microelectronics) and Guangdong Provincial Key Labratory of Optoelectronic Information Processing Chips and Systems, Sun Yat-sen University, Guangzhou, China
2. Comba Network Systems Company Limited, Guangzhou, China
3. State Key Laboratory of Terahertz and Millimeter Waves, Department of Electrical Engineering, City University of Hong Kong, Kowloon, Hong Kong