Authors
A. Zolotarjovs
Institute of Solid State Physics, University of Latvia, Latvia
R. Zabels
Institute of Solid State Physics, University of Latvia, Latvia
K. Kundzins
Institute of Solid State Physics, University of Latvia, Latvia
E. Gorokhova
Scientific and Production Association S.I.Vavilov State Optical Institute
E. Tamanis
Daugavpils University, Latvia