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Light localization using metamaterial (MM) nanotip is proposed. The structure is made of densely packed metallic nanoparticles. Such a MM shows strong dispersion with a Lorentzian line shape in the effective permittivity. The resonance is centred at the frequency where the collective localized plasmon polariton is excited. At wavelengths smaller than the resonance wavelength, the effective permittivity...
Electromagnetic properties of artificial media formed by lattices of thin conducting straight wires (referred to as wire media, WM) are discussed. Wire media can be described in terms of effective permittivity, which is negative at low frequencies that gives background to call it as "artificial plasma". Strong spatial dispersion is inherent in WM and it determines their main properties....
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