Terahertz Range Surface-Wave Bragg Resonators with Optimized Ratio between Ohmic and Radiative Losses Andrey M. Malkin, P. Demchenko, N.S. Ginzburg, S.E. Fil’chenkov, A.S. Sergeev and V.Yu. Zaslavsky EPJ Web Conf., 195 (2018) 06021 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819506021