1. LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, The Photonics Institute (TPI), Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
2. School of Physical and Mathematical Sciences, Division of Physics and Applied Physics, Nanyang Technological University, 639798 Singapore
3. ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton Campus, Melbourne, Victoria 3800, Australia
4. Department of Electrical and Electronics Engineering and Department of Physics, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, Ankara 06800, Turkey
5. CINTRA UMI CNRS/NTU/THALES 3288, Research Techno
Plaza, 50 Nanyang Drive, Border X Block, Level 6, 637553 Singapore