TY  - JOUR
AU  - Kuzel, P.
AU  - Kadlec, F.
AU  - Nemec, H.
AU  - Ott, R.
AU  - Hollmann, E.
AU  - Klein, N.
TI  - Dielectric tunability of SrTiO3 thin films in the terahertz range
JO  - Applied physics letters
VL  - 88
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-57787
SP  - 102901
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000235905800051
DO  - DOI:10.1063/1.2183370
UR  - https://juser.fz-juelich.de/record/57787
ER  -