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11 papers · 2 filters
Nonlinear properties of split-ring resonators
Bingnan Wang, Jiangfeng Zhou, Thomas Koschny +1
In this letter, the properties of split-ring resonators (SRRs) loaded with high-Q capacitors and nonlinear varactors are theoretically analyzed and experimentally measured. We demo…
Role of covalent Fe-As bonding in the magnetic moment formation and exchange mechanisms in iron-pnictide superconductors
K. D. Belashchenko, V. P. Antropov
The electronic origin of the huge magnetostructural effect in layered Fe-As compounds is elucidated using LiFeAs as a prototype. The crucial feature of these materials is the stron…
Competition between antiferromagnetic instability and frustrations in Fe-Se
J. J. Pulikkotil, L. Ke, M. van Schilfgaarde +2
Using linear-response density-functional theory, we obtain the magnetic interactions in the several iron pnictides. The ground state has been found to be non-collinear in FeSe, wit…
Low Loss Metamaterials Based on Classical Electromagnetically Induced Transparency
Ph. Tassin, Lei Zhang, Th. Koschny +2
We demonstrate theoretically that electromagnetically induced transparency can be achieved in metamaterials, in which electromagnetic radiation is interacting resonantly with mesos…
Strong diamagnetic response of metamaterials
E. N. Economou, Th. Koschny, C. M. Soukoulis
We demonstrate that there is a strong diamagnetic response of metamaterials, consisting of open or closed split ring resonators (SRRs). Detailed numerical work shows that for dense…
An efficient way to reduce losses of left-handed metamaterials
Jiangfeng Zhou, Thomas Koschny, Costas M. Soukoulis
We propose a simple and effective way to reduce the losses in left-handed metamaterials by manipulating the values of the effective parameters R, L, and C. We investigate the role…