1. Institute of Physics of the Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 00 Prague, Czech Republic
2. Faculty of Electrical Engineering, CTU in Prague, Technická 2, 166 27 Prague, Czech Republic
3. Fill Factory s.r.o., Televizní 2618, 756 61 Rožnov pod Radhoštěm, Czech Republic
4. Faculty of Science, Masaryk University, Kotlářská 2, 602 00 Brno, Czech Republic