Generation of terahertz pulses from the island films of topological insulator Bi2-xSbxTe3-ySeyK.A. Kuznetsov, G.Kh. Kitaeva, P.I. Kuznetsov and G.G. YakushchevaEPJ Web Conf., 195 (2018) 06008DOI: https://doi.org/10.1051/epjconf/201819506008