1. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
2. Excelitas Technologies, Singapore 627969
3. CNRS-International-NTU-Thales Research Alliance, Singapore 637553
4. Department of Electronic Engineering, Chang Gung University, Taoyuan 33302, Taiwan
5. School of Material Science Engineering, Nanyang Technological University, Singapore 639798