1. Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Jagtvej 160, København Ø 2100, Denmark
2. Computational Materials Group, SDU Centre for Photonics Engineering, University of Southern Denmark, Campusvej 55, Odense 5230, Denmark
3. Department of Electrical and Photonics Engineering, Photonic Nanotechnology, NanoPhoton – Center for Nanophotonics, DTU, Ørsteds Plads, 345A, 276, Kgs. Lyngby 2800, Denmark