1. School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore
2. Institute of Microelectronics (IME) Agency for Science, Technology and Research (A*STAR) 2 Fusionopolis Way, Innovis #08‐02 Singapore 138634 Republic of Singapore
3. Low Energy Electronic Systems Singapore‐MIT Alliance for Research and Technology Singapore 138602 Singapore
4. School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
5. Temasek Laboratories@NTU Nanyang Technological University Singapore 637553 Singapore