%0 Journal Article
%A Kuzel, P.
%A Kadlec, F.
%A Nemec, H.
%A Ott, R.
%A Hollmann, E.
%A Klein, N.
%T Dielectric tunability of SrTiO3 thin films in the terahertz range
%J Applied physics letters
%V 88
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-57787
%P 102901
%D 2006
%Z Record converted from VDB: 12.11.2012
%X We have developed an interdigited electrode structure for applying a static electric field to a ferroelectric thin film, which enables nearly full transmission of a perpendicularly polarized terahertz wave. This approach has been used to determine the electric field dependence of the complex permittivity of a SrTiO3 thin film on a sapphire substrate up to about 2 THz employing time-domain terahertz spectroscopy. We have demonstrated up to 10% variation of the film permittivity at 300 GHz at room temperature induced by an applied electric field of 100 kV/cm. No dielectric dispersion is observed between 1 MHz and about 500 GHz. The field-induced changes are attributed to soft mode hardening. (c) 2006 American Institute of Physics.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000235905800051
%R 10.1063/1.2183370
%U https://juser.fz-juelich.de/record/57787