ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
권호 표지

Novel Planar Metamaterial with a Negative Refractive Index

  • Kim, Dong-Ho (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
  • Choi, Jae-Ick (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI)
  • Received : 2008.10.22
  • Accepted : 2009.02.18
  • Published : 2009.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

A new planar metamaterial (MTM) with simultaneous negative values of permittivity (${\varepsilon}$) and permeability (${\mu}$) is proposed. Our MTM is composed of two identical copper patterns etched on both sides of dielectric laminate, which is very thin and easy to fabricate. Unlike conventional MTMs, the proposed structure shows a negative refractive index (NRI) behavior with respect to a normally incident wave. To explain the underlying principle of the NRI characteristics, an equivalent resonant circuit model based on surface current density distribution is investigated. An eigenmode analysis and a three-dimensional wave simulation for the stacked MTM prism are also performed to verify the existence of negative refraction. The experimental results from the transmission and reflection measurement ensure the validity of our design approach and show good agreement with the theoretically predicted effective medium parameters.

Keywords

References

  1. R.A. Shelby, D.R. Smith, and S. Schultz, “Experimental Verification of a Negative Index of Refraction,” Science, vol. 292, Apr. 2001, pp. 77-79. https://doi.org/10.1126/science.1058847
  2. J. Huangfu et al., “Experimental Confirmation of Negative Refractive Index of a Metamaterial Composed of Ω–like Metallic Patterns,” Appl. Phy. Lett., vol. 84, no. 9, 2004, pp.1537-1539. https://doi.org/10.1063/1.1655673
  3. T.M. Grzegorczyk et al., “Refraction Experiments in Waveguide Environments,” in Metamaterials: Physics and Engineering Explorations, N. Engheta and R.W. Ziolkowski (eds.), Wiley-Interscience, 2006, pp. 113-140.
  4. H. Chen et al., “Left-Handed Materials Composed of Only SShaped Resonators,” Phy. Rev. E, vol. 70, 057605, 2004. https://doi.org/10.1103/PhysRevE.70.057605
  5. L. Markeley and G.V. Eleftheriades, “A Negative-Refractive-Index Metamaterial for Incident Plane Waves of Arbitrary Polarization,” IEEE Antennas Propag. Lett., vol. 6, 2007, pp. 28-31.
  6. X. Chen et al., “Robust Method to Retrieve the Constitutive Effective Parameters of Metamaterials,” Phy. Rev. E, vol. 70, 016608, 2004. https://doi.org/10.1103/PhysRevE.70.016608