1. Electrical and Computer
Engineering, National University of Singapore, Singapore 117576
2. NUSNNI-Nanocore, National University of Singapore, Singapore 117576
3. Institute of Materials and
Research Engineering, Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
4. Singapore
MIT Alliance Research and Technology, 1 CREATE Way, #10-01 CREATE Tower, National University of Singapore, Singapore 138602
5. Division of Physics and
Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371