1. School of Materials Science and Engineering; Nanyang Technological University; Singapore 639798 Singapore
2. NOVITAS, Nanoelectronics Centre of Excellent; School of Electrical and Electronic Engineering; Nanyang Technological University; Singapore 639798 Singapore
3. CINTRA CNRS/NTU/THALES; UMI 3288, Research Techno Plaza; 50 Nanyang Drive, Border X Block, Level 6 Singapore 637553 Singapore
4. Centre for Disruptive Photonic Technologies; School of Physics and Mathematics Sciences; Nanyang Technological University; Singapore 637371 Singapore