Electrical Characterizations of Paraelectric BST Thin Films up to 1 THz: Realization of Microwave Phaseshifters

Vélu, G.; Houzet, Grégory; Burgnies, Ludovic; Carru, Jean-Claude; Marteau, A.; Blary, K.; Lippens, D.; Mounaix, Patrick; Tondusson, Marc; Nguema, E.

doi:10.1080/00150190701367036

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…Although the isotropic negative permeability is demonstrated in the 3D medium only at microwave frequencies, it is possible to extend this behavior down to shorter wavelengths because BST still has large permittivity of 200 -300 in the terahertz range [24]. Additionally the magnetic activity based on Mie resonance can also be achieved within a broad frequency range from the terahertz to the deep infrared region by suitable choice of materials and particle dimensions, for example, polaritonic crystal (LiTaO 3 ) have a permittivity of 400 at approximate 3.5 THz [17].…”

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confidence: 99%

Experimental Demonstration of Isotropic Negative Permeability in a Three-Dimensional Dielectric Composite

et al. 2008

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Isotropic negative permeability resulting from Mie resonance is demonstrated in a three-dimensional (3D) dielectric composite consisting of an array of dielectric cubes. A strong subwavelength magnetic resonance, corresponding to the first Mie resonance, was excited in dielectric cubes by electromagnetic wave. Negative permeability is verified in the magnetic resonance area via microwave measurement and the dispersion properties. The resonance relies on the size and permittivity of the cubes. It is promising for construction of novel isotropic 3D left-handed materials with a simple structure.

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confidence: 99%

Experimental Demonstration of Isotropic Negative Permeability in a Three-Dimensional Dielectric Composite

et al. 2008

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“…Using Network Analyser, a resonance of partially fold part of waveguide was studied and analysed [16]. The quality factor and resonant frequency were used to calculate film loss and ε, Fig.…”

Section: Non-resonant Methods Of Film Investigationmentioning

confidence: 99%

Microwave study of ferroelectrics in waveguide

Poplavko¹,

Молчанов²,

Pashkov³

et al. 2008

2008 Microwaves, Radar and Remote Sensing Symposium

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Peculiar feature of ferroelectrics is high dielectric permittivity ε which sometimes is accompanied by very big loss tangent tanδ. This is a reason of difficulties to obtain accurate characterization despite of variety of techniques available. This report is devoted to the selection of proper waveguide method for specific cases of bulk or film materials investigation to obtain reliable data of their ε and tanδ.

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“…Therefore, the invisible frequency band of the demonstrated dielectric cloak can be easily extended from microwave to THz frequencies as long as the high permittivity of the cuboid can be achieved at the working frequency. It is known that Ba 0.5 Sr 0.5 TiO 3 possesses a high permittivity of 200 around 1 THz [37], which may serve as a good candidate towards the alldielectric cloak in the THz regime.…”

Section: Discussionmentioning

confidence: 99%

Temperature-Controlled Chameleonlike Cloak

et al. 2017

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Invisibility cloaking based on transformation optics has brought about unlimited space for reverie. However, the design and fabrication of transformation-optics-based cloaks still remain fairly challenging because of the complicated, even extreme, material prescriptions, including its meticulously engineered anisotropy, inhomogeneity and singularity. And almost all the state-of-the-art cloaking devices work within a narrow and invariable frequency band. Here, we propose a novel mechanism for all-dielectric temperature-controllable cloaks. A prototype device was designed and fabricated with SrTiO 3 ferroelectric cuboids as building blocks, and its cloaking effects were successfully demonstrated, including its frequency-agile invisibility by varying temperature. It revealed that the predesignated cloaking device based on our proposed strategy could be directly scaled in dimensions to operate at different frequency regions, without the necessity for further efforts of redesign. Our work opens the door towards the realization of tunable cloaking devices for various practical applications and provides a simple strategy to readily extend the cloaking band from microwave to terahertz regimes without the need for reconfiguration.

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Electrical Characterizations of Paraelectric BST Thin Films up to 1 THz: Realization of Microwave Phaseshifters

Cited by 9 publications

References 9 publications

Experimental Demonstration of Isotropic Negative Permeability in a Three-Dimensional Dielectric Composite

Experimental Demonstration of Isotropic Negative Permeability in a Three-Dimensional Dielectric Composite

Microwave study of ferroelectrics in waveguide

Temperature-Controlled Chameleonlike Cloak

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