1. Metamaterials Unit Faculty of Science University of Malta MSD 2080 Msida Malta
2. Institute of Physics University of Zielona Góra ul. Szafrana 4a 65-069 Zielona Góra Poland
3. Department of Chemistry Faculty of Science University of Malta MSD 2080 Msida Malta
4. Centre for Molecular Medicine and Biobanking University of Malta MSD 2080 Msida Malta