Highly tunable SrTiO_3/DyScO_3 heterostructures for applications in the terahertz range

摘要

Several types of multilayer structures based on SrTiO_3 and DyScO_3 thin films were prepared by laser ablation. The dielectric properties of these samples without and under applied static or low-frequency electric field at room temperature were determined in the terahertz spectral range by time-domain terahertz spectroscopy. We demonstrate up to 65% variation of the permittivity of SrTiO_3 films and up to 33% modulation of the power transmission of terahertz waves at 500 GHz and 100 V (67 kV/cm) bias.