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. Universitè de Lyon, Universitè Claude Bernard, Lyon 1, CNRS, Institut Lumière Matière UMR5306, Villeurbanne F-69622, France
5. Natural Sciences and Science Education, National Institute of Education, 1 Nanyang Walk, 637616, Singapore
6. Institute of Electronics, Microelectronics and Nanotechnologies (IEMN), CNRS UMR 8520—University of Lille, 59650 Villeneuve d’Ascq Cedex, France