1. Photonics Research Group, Ghent University, Gent 9000, Belgium
2. Physics and Chemistry of Nanostructures, Department of Chemistry, Ghent University, Gent 9000, Belgium
3. Center for Nano and Biophotonics, Ghent University, Gent 9000, Belgium
4. School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6012, New Zealand
5. The Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin 9016, New Zealand
6. MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
7. Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington 6012, New Zealand
8. Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
9. Liquid Crystals and Photonics Research Group, Department of Electronics and Information Systems, Ghent University, Gent 9000, Belgium