Journal of electromagnetic engineering and science

  • 제12권1호
  • /
  • Pages.26-31
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  • 2012
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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A Sub-Wavelength Focusing Lens Composed of a Dual-Plate Metamaterial Providing a Negative Refractive Index

  • Kim, Dong-Ho (Department of Electronic Engineering, Sejong University)
  • 투고 : 2011.11.08
  • 심사 : 2012.01.16
  • 발행 : 2012.03.31
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초록

We have proposed a metamaterial lens that enables sub-wavelength focusing, which is shorter than an operating wavelength. Our lens is a two dimensional array of a unit cell consisting of a metallic dual-plate printed on a dielectric substrate. The unique dual-plate structure provides negativeness both in permittivity and permeability, with no help from conventional additional structures, which are normally printed on the opposite of metallic patterns. Therefore, we can focus a source (or an image) in a tiny distance shorter than the free space wavelength (${\lambda}$) at the frequencies of interest. Furthermore, since the proposed geometry does not need separate supplementary structures to acquire negative permittivity or permeability, our lens is much simpler than conventional metamaterial lenses, which is a strong point in practical applications. We have validated sub-wavelength focusing ability in a 6 GHz frequency band through an experiment of near field scanning, which provided the width of about 0.19 ${\lambda}$ at a half maximum of a peak value of an measured image. The width of the focused image through the lens is more than 4 times shorter than that without the lens, which confirms the validity of our design approach.

키워드

참고문헌

  1. V. G. Veslago, "The electrodynamics of substances with simultaneously negative values of ${\varepsilon}$ and ${\mu}$," Soviet Phys. Uspekhi, vol. 10, no. 4, pp. 509-514, 1968. https://doi.org/10.1070/PU1968v010n04ABEH003699
  2. J. B. Pendry, A. J. Holden, D. J. Robbins, and W. J. Stewart, "Magnetism from conductors and enhanced nonlinear phenomena," IEEE Trans. Microw. Theory Tech., vol. 47, no. 11, pp. 2075-2084, 1999. https://doi.org/10.1109/22.798002
  3. D. R. Smith, N. Kroll, "Negative refractive index in left-handed materials," Phys. Rev. Letts., vol. 85, no. 14, pp. 2933-2936, 2000. https://doi.org/10.1103/PhysRevLett.85.2933
  4. D. R. Smith, W. J. Padilla, D. C. Vier, S. C. Nemat- Nasser, and S. Schultz, "Composite medium with simultaneously negative permeability and permittivity," Phys. Rev. Letts., vol. 84, no. 18, pp. 4184-4187, 2000. https://doi.org/10.1103/PhysRevLett.84.4184
  5. R. A. Shelby, D. R. Smith, and S. Schultz, "Experimental verification of a negative index of refraction," Science, vol. 292, pp. 77-79, 2001. https://doi.org/10.1126/science.1058847
  6. D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, "Metamaterial electromagnetic cloak at microwave frequencies," Sciencexpress, vol. 314, no. 5801, pp. 977-980, 2006.
  7. D. Kim, J. Choi, "Novel planar metamaterial with a negative refractive index," ETRI Journal, vol. 31, no. 2, pp. 225-227, 2009. https://doi.org/10.4218/etrij.09.0208.0337
  8. D. Kim, W. Lee, and J. Choi, "A simple design method of negative refractive index metamaterials," Appl. Phys. A, vol. 97, no. 2, pp. 461-467, 2009. https://doi.org/10.1007/s00339-009-5242-y
  9. J. B. Pendry, "Negative refraction makes a perfect lens," Phys. Rev. Letts., vol. 85, no. 18, pp. 3966-3969, 2000. https://doi.org/10.1103/PhysRevLett.85.3966
  10. K. Aydin, E. Ozbay, "Left-handed metamaterial based superlens for subwavelength imaging of electromagnetic waves," Appl. Phys. A, vol. 87, pp. 137-141, 2007. https://doi.org/10.1007/s00339-006-3817-4
  11. K. Aydin, I. Bulu, and E. Ozbay, "Subwavelength resolution with a negative-index metamaterial superlens," Appl. Phys. Letts., vol. 90, 254102, 2007. https://doi.org/10.1063/1.2750393
  12. R. J. Blaikie, D. O. S. Melville, "Imaging through planar silver lenses in the optical near field," J. Optics A, vol. 7, pp. 176-183, 2005. https://doi.org/10.1088/1464-4258/7/2/023
  13. D. Shreiber, M. Gupta, and R. Cravey, "Microwave nondestructive evaluation of dielectric materials with a metamaterial lens," Sensors and Actuators A, vol. 144, pp. 48-55, 2008. https://doi.org/10.1016/j.sna.2007.12.031
  14. M. Navarro-Cia, M. Beruete, I. Campillo, and M. S. Ayza, "Beamforming by left-handed extraordinary transmission metamaterial bi- and plano-concave lens at millimeter-waves," IEEE Trans. Antennas Propagat., vol. 59, no. 6, pp. 2141-2151, 2011. https://doi.org/10.1109/TAP.2011.2143651
  15. X. Chen, T. M. Grzegorczyk, B. -I. Wu, J. Pachero Jr., and J. A. Kong, "Robust method to retrieve the constitutive effective parameters of metamaterials," Phys. Rev. E, vol. 70, 016608, 2004. https://doi.org/10.1103/PhysRevE.70.016608
  16. J. D. Jackson, Classical Electrodynamics, 3rd ed., Wiley, New York, 1999.

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