1. Joint Stock Company "Etronika", LT-09132 Vilnius, Lithuania
2. Department of Physics, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania
3. Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
4. Department of General and Inorganic Chemistry, Vilnius University, LT-03225 Vilnius, Lithuania
5. Department of Electrical and Computer Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627-0231, USA