Nonlinear Transfer of Intense Few Cycle Terahertz Pulse Through Opaque Semiconductors O.V. Chefonov, A.V. Ovchinnikov, M.B. Agranat, V.E. Fortov, E.S. Efimenko, A.N. Stepanov, T. Ozaki, X. Chai, X. Ropagnol, A.A. Ushakov and A.B. Savel’ev EPJ Web Conf., 195 (2018) 07007 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819507007