L. E. Vorob’ev1, D. A. Firsov1, V. A. Shalygin1, V. Tulupenko2, N. N. Ledentsov3, P. S. Kop’ev3, V. M. Ustinov3, Yu. M. Shernyakov3, Жорес Иванович Алферов3
1Department of Radiophysics, St. Petersburg State Technical University, St. Petersburg, Russian Federation
2Donbass State Machinery Academy, Kramatorsk, Ukraine
3A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russian Federation