Generation of terahertz pulses from the island films of topological insulator Bi2-xSbxTe3-ySey K.A. Kuznetsov, G.Kh. Kitaeva, P.I. Kuznetsov and G.G. Yakushcheva EPJ Web Conf., 195 (2018) 06008 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819506008