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Planar designs for electromagnetically induced transparency in metamaterials
Philippe Tassin, Lei Zhang, Thomas Koschny +2
We present a planar design of a metamaterial exhibiting electromagnetically induced transparency that is amenable to experimental verification in the microwave frequency band. The…
Optical forces in nanowire pairs and metamaterials
Rongkuo Zhao, Philippe Tassin, Thomas Koschny +1
We study the optical force arising when isolated gold nanowire pairs and metamaterials with a gold nanowire pair in the unit cell are illuminated with laser radiation. Firstly, we…
Large group delay in a microwave metamaterial analogue of electromagnetically induced transparency
Lei Zhang, Philippe Tassin, Thomas Koschny +3
We report on our experimental work concerning a planar metamaterial exhibiting classical electromagnetically induced transparency (EIT). Using a structure with two mirrored split-r…
Arrays of Ag split-ring resonators coupled to InGaAs single-quantum-well gain
Nina Meinzer, Matthias Ruther, Stefan Linden +6
We study arrays of silver split-ring resonators operating at around 1.5-μm wavelength coupled to an MBE-grown single 12.7-nm thin InGaAs quantum well separated only 4.8 nm from the…
Repulsive Casimir forces with finite-thickness slabs
R. Zhao, Th. Koschny, E. N. Economou +1
We use the extended Lifshitz theory to study the behaviors of the Casimir forces between finite-thickness effective medium slabs. We first study the interaction between a semi-infi…
Self-consistent calculations of loss compensated fishnet metamaterials
Anan Fang, Thomas Koschny, Costas M. Soukoulis
We present a computational approach, allowing for a self-consistent treatment of three-dimensional (3D) fishnet metamaterial coupled to a gain material incorporated into the nanost…
Chiral metamaterials with negative refractive index based on four "U" split ring resonators
Zhaofeng Li, Rongkuo Zhao, Thomas Koschny +5
A uniaxial chiral metamaterial is constructed by double-layered four "U" split ring resonators mutually twisted by 90 degrees. It shows a giant optical activity and circular dichro…
Chiral metamaterials: retrieval of the effective parameters with and without substrate
Rongkuo Zhao, Thomas Koschny, Costas M. Soukoulis
After the prediction that strong enough optical activity may result in negative refraction and negative reflection, more and more artificial chiral metamaterials were designed and…
Conjugated gammadion chiral metamaterial with uniaxial optical activity and negative refractive index
R. Zhao, L. Zhang, J. Zhou +2
We demonstrate numerically and experimentally a conjugated gammadion chiral metamaterial that uniaxially exhibits huge optical activity and circular dichroism, and gives a negative…
Microstructure Effects for Casimir Forces in Chiral Metamaterials
Alexander P. McCauley, Rongkuo Zhao, M. T. Homer Reid +7
We examine a recent prediction for the chirality-dependence of the Casimir force in chiral metamaterials by numerical computation of the forces between the exact microstructures, r…
Wide-angle and polarization-independent chiral metamaterial absorber
Bingnan Wang, Thomas Koschny, Costas M. Soukoulis
We propose a resonant microwave absorber based on a chiral metamaterial. We show, with both numerical simulations and experimental measurements, that the absorber works well for a…
Reducing Ohmic Losses in Metamaterials by Geometric Tailoring
Durdu O. Guney, Thomas Koschny, Costas M. Soukoulis
Losses in metamaterials render the applications of such exotic materials less practical unless an efficient way of reducing them is found. We present two different techniques to re…
Intra-connected three-dimensionally isotropic bulk negative index photonic metamaterial
Durdu O. Guney, Thomas Koschny, Costas M. Soukoulis
Isotropic negative index metamaterials (NIMs) are highly desired, particularly for the realization of ultra-high resolution lenses. However, existing isotropic NIMs function only t…
Twisted split-ring-resonator photonic metamaterial with huge optical activity
M. Decker, R. Zhao, C. M. Soukoulis +2
Coupled split-ring-resonator metamaterials have previously been shown to exhibit large coupling effects, which are a prerequisite for obtaining large effective optical activity. By…