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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 29, Iss. 4 — Apr. 1, 2012
  • pp: 473–475

Electromagnetic field attractor made of gradient index metamaterials

Yarong Yang, Loo Yoke Leng, Ning Wang, Yungui Ma, and C. K. Ong  »View Author Affiliations

JOSA A, Vol. 29, Issue 4, pp. 473-475 (2012)

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We present a device that is designed with varying permittivity ε(r) such that an electromagnetic wave in the K-band of the microwave regime entering it will bend inward towards the core. The core is made of silicon composites. We follow the distribution formula of the permittivity for the device derived by Narimanov and Kildishev using the optical-mechanical analogy. The diameter of the device is 14 cm, and it is constructed out of 21 rings of two different types of etched printed circuit boards, as well as dielectric powders as adding filling materials. The experimental wave intensity profile, based on parallel plate measurements for the cases where the incident plane wave is slightly displaced to the top of the center of the device and the case of on center incidence, are presented and discussed. In spite of some mismatch of the core and metamaterial structures of the device found, approximately 80% of the wave still manages to reach the core of the device and gets trapped and absorbed. Broadband properties of the device are also investigated.

© 2012 Optical Society of America

OCIS Codes
(110.2760) Imaging systems : Gradient-index lenses
(220.3630) Optical design and fabrication : Lenses
(230.0230) Optical devices : Optical devices
(350.6980) Other areas of optics : Transforms

ToC Category:
Optical Design and Fabrication

Original Manuscript: October 14, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 10, 2011
Published: March 15, 2012

Yarong Yang, Loo Yoke Leng, Ning Wang, Yungui Ma, and C. K. Ong, "Electromagnetic field attractor made of gradient index metamaterials," J. Opt. Soc. Am. A 29, 473-475 (2012)

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