1. Department of General Physics and Modelling of Physical Processes National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37 Peremohy Avenue Kyiv 03056 Ukraine
2. Division of Optics Institute of Physics CAS Na Slovance 2 18221 Prague 8 Czech Republic
3. Faculty of Biomedical Engineering Czech Technical University in Prague nam. Sitna 3105 27201 Kladno Czech Republic
4. V.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine 41, Nauky Avenue Kyiv 03028 Ukraine