1. European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Bruno Kessler Foundation) and Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy
2. Laboratory of Bio-Inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
3. Bruno Kessler Foundation, Trento, Italy
4. School of Engineering and Materials Science, Queen Mary University of London, UK
5. Departamento de Física, Centro de Investigación en Óptica y Nanofísica, Universidad de Murcia, Spain
6. Departament de Física Aplicada, Universitat d'Alacant, Spain
7. Peter the Great St. Petersburg Polytechnic University, Russia