1. Department of Physics and Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
2. School of Engineering and Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
3. Spectrum Instruments Ltd., Stewart House, National Technological Park, Limerick, Ireland
4. Funcoats SA, Technoport 4B, Rue du Commerce Foetz, Luxembourg
5. Engineering Department, Roma Tre University, Via della Vasca Navale 79, Rome, 00146, Italy