Institution: | aDepartment of Physics, Faculty of Electrical Engineering, University of Zilina, Zilina 01026, Slovakia;bDepartment of Microelectronics, Slovak University of Technology, Bratislava 812 19, Slovakia;cInternational Laser Center, Bratislava 812 19, Slovakia;dPolymer Institute, Slovak Academy of Sciences, Bratislava 842 36, Slovakia |