1. Department of Applied Physics and Photonics, Brussels Photonics (B-PHOT), Vrije Universiteit Brussel, Brussels, Belgium
2. Department of Glass, Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Warsaw, Poland
3. Department of Organic and Macromolecular Chemistry, Polymer Chemistry, Centre of Macromolecular Chemistry (CMaC), and Biomaterials Group (PBM), Ghent University, Ghent, Belgium