1. School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
2. CINTRA UMI CNRS/NTU/THALES 3288, Research Techno Plaza, 50 Nanyang Drive, Border X Block, Level 6, 637553 Singapore
3. Institute of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Torun, ul. Grudziadzka 5, 87-100 Torun, Poland
4. Universitéé de Lyon, Université Claude Bernard, Lyon 1, CNRS, Institut Lumière Matière UMR5306, Villeurbanne F-69622, France
5. Nanolumi, 22 Boon Lay Way #01-61, Tradehub 21, 609968 Singapore
6. Natural Sciences and Science Education, National Institute of Education, 1 Nanyang Walk, 637616 Singapore