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      Advanced Jones calculus for the classification of periodic metamaterials

      , ,
      Physical Review A
      American Physical Society (APS)

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          Gold helix photonic metamaterial as broadband circular polarizer.

          We investigated propagation of light through a uniaxial photonic metamaterial composed of three-dimensional gold helices arranged on a two-dimensional square lattice. These nanostructures are fabricated via an approach based on direct laser writing into a positive-tone photoresist followed by electrochemical deposition of gold. For propagation of light along the helix axis, the structure blocks the circular polarization with the same handedness as the helices, whereas it transmits the other, for a frequency range exceeding one octave. The structure is scalable to other frequency ranges and can be used as a compact broadband circular polarizer.
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            Optical negative-index metamaterials

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              Magnetic response of metamaterials at 100 terahertz.

              An array of single nonmagnetic metallic split rings can be used to implement a magnetic resonance, which arises from an inductor-capacitor circuit (LC) resonance, at 100-terahertz frequency. The excitation of the LC resonance in the normal-incidence geometry used in our experiments occurs through the coupling of the electric field of the incident light to the capacitance. The measured optical spectra of the nanofabricated gold structures come very close to the theoretical expectations. Additional numerical simulations show that our structures exhibit a frequency range with negative permeability for a beam configuration in which the magnetic field couples to the LC resonance. Together with an electric response that has negative permittivity, this can lead to materials with a negative index of refraction.
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                Author and article information

                Journal
                PLRAAN
                Physical Review A
                Phys. Rev. A
                American Physical Society (APS)
                1050-2947
                1094-1622
                November 2010
                November 15 2010
                : 82
                : 5
                Article
                10.1103/PhysRevA.82.053811
                bd7ffeee-d6e0-4539-be25-b9d96168c9b0
                © 2010

                http://link.aps.org/licenses/aps-default-license

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