%0 Journal Article
%A Kuzel, P.
%A Kadlec, C.
%A Kadlec, F.
%A Schubert, J.
%A Panaitov, G.
%T Field-induced soft mode hardening in SrTi03/DySc03 multilayers
%J Applied physics letters
%V 93
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-62959
%P 052910-1 - 052910-3
%D 2008
%Z Record converted from VDB: 12.11.2012
%X We investigate a SrTiO3/DyScO3 epitaxial multilayer with four 50-nm-thick layers of each compound deposited on DyScO3 substrate by pulsed laser deposition. The spectra of SrTiO3 obtained using time-domain terahertz spectroscopy at room temperature with and without electrical bias are explained by the ferroelectric soft mode coupled to a silent central peak, where the bare soft mode frequency is the only field-dependent parameter. We show that terahertz and subterahertz properties of the layers are determined solely by a tremendous hardening of the soft mode with increasing field. We demonstrate that our structure induces more than 40% modulation of the transmitted terahertz power in a broad frequency range of 0.65-1.15 THz at 140 V (93 kV/cm) bias.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000258335900057
%R 10.1063/1.2967336
%U https://juser.fz-juelich.de/record/62959