| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mounaix, Patrick
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2016Terahertz imaging and tomography as efficient instruments for testing polymer additive manufacturing objects
- 2015THz response of TiO2 microspheres embedded in a dielectric layer
- 2014Aeronautics composite material inspection with a terahertz time-domain spectroscopy systemcitations
- 2013Terahertz imaging of sub-wavelength particles with Zenneck surface wavescitations
- 2013Aeronautics composite material inspection with a terahertz time-domain spectroscopy systemcitations
- 2013Examination of femtosecond laser matter interaction in multipulse regime for surface nanopatterning of vitreous substratescitations
- 2012Towards left-handed metamaterials using single-size dielectric resonators: The case of TiO2-disks at millimeter wavelengthscitations
- 2012Resonant magnetic response of TiO2 microspheres at terahertz frequenciescitations
- 2011Dielectric dispersion of BaSrTiO3 thin film from centimeter to submillimeter wavelengthscitations
- 2011Resonant magnetic response of TiO2 microspheres at terahertz frequenciescitations
- 2010Dielectric dispersion of BaSrTiO3 thin film from centimeter to submillimeter wavelengthscitations
- 2009Tunable terahertz metamaterials with negative permeabilitycitations
- 2007Electrical characterizations of paraelectric BST thin films up to 1 THz : realization of microwave phase shifterscitations
- 2007Electrical characterizations of paraelectric BST thin films up to 1 THz : realization of microwave phase shifterscitations
- 2005High-Frequency response in ferroelectric BaSrTiO3 thin films studied by terahertz time-domain spectroscopycitations
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article
Dielectric dispersion of BaSrTiO3 thin film from centimeter to submillimeter wavelengths
Abstract
The dielectric dispersion of ferroelectric BaxSr1-xTiO3 (BST) thin film in a paraelectric phase was characterized from centimeter to submillimeter wavelengths. To this aim, interdigitated capacitors were patterned on a micrometer scale onto a BST layer with a barium concentration of 0.5 and were subsequently integrated by using a coplanar waveguide technology. The retrieval of the complex permittivity of BST was performed by vectorial scattering parameter measurements up to 190 GHz for various controlling dc field up to 300 kV/cm. At higher frequency, submillimeter wavelength measurements were performed by time domain spectroscopy under free space condition. On this basis, the dispersion of the real part of the permittivity along with the loss tangent are retrieved in agreement with a distributed interaction of ac-field with soft phonons vibration modes, and overlapping between dipole polarization and ionic polarization is observed, around 700 GHz. It is also shown that dipole polarization can be attributed to the presence of small polar nanoregions in the BST film which act as in ferroelectric material with diffuse phase transition. (c) 2011 American Institute of Physics. [doi:10.1063/1.3531534]