[1] Mokerov Inst Ultrahigh Frequency Semicond Elect, Moscow 117105, Russia
[2] Moscow Inst Phys & Technol, Moscow 117303, Russia
[3] Belarusian State Univ, Dept Radiophys & Comp Technol, Minsk 220030, BELARUS
[4] Ioffe Inst, St Petersburg 194021, Russia
[5] RAS, Res & Engn Ctr, Submicron Heterostruct Microelect, St Petersburg 194021, Russia
[6] Alferov Univ, Lab Nanophoton, St Petersburg 194021, Russia
[7] Moscow MV Lomonosov State Univ, Phys Dept, Moscow 119991, Russia
[8] Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia
[9] Lobachevsky State Univ, Dept Radiophys, Nizhnii Novgorod 603022, Russia
[10] Lobachevsky State Univ, Adv Sch Gen & Appl Phys, Nizhnii Novgorod 603022, Russia