Author Affiliations +
S. Cartaleva,1 A. Krasteva,1 A. Sargsyan,2 D. Sarkisyan,2 D. Slavov,1 T. Vartanyan3
1Institute of Electronics (Bulgaria)
2Institute for Physical Research (Armenia)
3St. Petersburg National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)