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The behavior of an electromagnetic metamaterial that presents a phenomenological analogue of the Mossbauer effect was reported, where the metamaterial resonance becomes narrower and stronger with increasing number of meta-molecules in the array structure, similarly to how the broad gamma-emission line collapses in crystalline media.
It has been shown recently that the classical phenomenon of optical activity, which is traditionally associated with chirality (helicity) of organic molecules, proteins and inorganic structures, can be observed in artificial planar media which exhibit neither 3D nor 2D chirality and called this effect "extrinsic chirality". This paper investigates a photonic metamaterial consisting of a...
We demonstrate strong optical activity (and circular dichroism) for both microwave and photonic achiral planar metamaterials. The effect arises from extrinsic chirality resulting from oblique incidence of light onto the metamaterial structures.
We introduce a new class of coherent metamaterials where regular ensembles of meta-molecules show collective, coherent narrow-band response leading to unusual electromagnetic properties and potential applications in the lasing spaser.
Artificial magnetism, negative permeability and zero refractive index are demonstrated in 3D-chiral metamaterial that shows giant polarization rotation and circular dichroism.
We report that small chiral asymmetry of the unit cell of planar metamaterials leads to strong resonant asymmetric transmission for circularly polarized light due to excitation of enantiomerically sensitive trapped modes.
This work provides experimental evidence that an electromagnetic pulse can be delayed with minimum loss and distortion, while propagating through a new type of planar metamaterials that supports modes weakly coupled to free-space radiation. This study also shows that the pulse velocity can be controlled through appropriate subwavelength patterning of a thin metal film, namely a planar metamaterial.
We demonstrate a novel type of chiral photonic metamaterial based on pairs of physically separated mutually twisted planar metal patterns. It exhibits very strong gyrotropy (2500deg/mm) in the visible, near-infrared and microwave spectral ranges.
This article discusses some properties of planar chiral metamaterials. The polarization transformations due to the effect of planar chiral circular conversion dichroism on planar chiral periodic structures is taken for example. The behavior of an anisotropic chiral array of uninterrupted strips is studied.
This paper reviews our recent progress in nanoimprint lithography and hot embossing for the fabrications of planar photonic meta-materials and photonic gratings. With these technologies, dielectric, metallic chiral structures and dense gratings in sizes from sub micrometres down to sub-100 nm were successfully fabricated. Characterisations of these meta-materials and photonic structures indicate these...
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