1. Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
3. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
4. Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
5. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
6. State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China
7. NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
8. CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza, Singapore 637553, Singapore