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Nucleic acid testing is a common technique for medical diagnostics. For example, it is used to detect HIV treatment failure by monitoring viral load levels. Quadruplex Priming Amplification (QPA) is an isothermal nucleic acid amplification technique that requires little power and few chemical reagents per assay, all features that make QPA well suited for point-of-care (POC) diagnostics. The QPA assay...
We show for the first time that, contrary to common expectations, transition to superconductivity affects plasmonic behaviour of niobium at optical frequencies. This result is unexpected as photon energy is orders of magnitude higher than the binding energy of the Cooper pairs, the superconducting charge carriers.
We report on the experimental demonstration of a new radiation phenomenon on the nanoscale and its engineering into a reconfigurable metadevice: luminescence emission lines within the Fermi sea can be created by nanopatterning metal surfaces and tuned by external electrical inputs.
Dynamic control over metamaterial optical properties is the basis for the use of metamaterials as active elements from switches and modulators to tunable filters and programmable transformation optics devices.
We show experimentally that highly localized excitations in planar plasmonic metamaterials drive spatially-coherent, directional, threshold-free light emission, providing a platform for the development of a new generation of nanoscale light sources.
We provide the first demonstration of megahertz-rate electro-optical modulation using a reconfigurable photonic metamaterial driven by electrostatic forces. The modulator can also be engaged in nonvolatile switching providing 90% switching contrast.
We report that engineering of chiral and nonlinear optical properties in plasmonic metamaterial allows the observation of Nonlinear Optical Activity that is millions of times stronger than in natural materials offering a potential for practical applications.
We review our recent results in the development of nanostructured photonic metamaterials which provide unprecedented levels of active (nonlinear, switchable, tunable) control over light on the sub-wavelength scale.
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.
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.
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.
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.
We demonstrate novel chiral photonic metamaterials consisting of physically separated mutually twisted planar metal patterns in parallel planes. Such metamaterials are shown to exhibit very strong gyrotropy (600??/mm) in the visible, near-IR and microwaves.
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