1. Institute of High Pressure Physics PAS, Sokolowska 29/37, 01-142 Warsaw, Poland
2. Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
3. TopGaN Ltd, Sokolowska 29/37, 01-142 Warsaw, Poland