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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: 426–430

Broadband microwave Luneburg lens made of gradient index metamaterials

Yoke Leng Loo, Yarong Yang, Ning Wang, Yun Gui Ma, and Chong Kim Ong  »View Author Affiliations

JOSA A, Vol. 29, Issue 4, pp. 426-430 (2012)

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Luneburg lenses are able to form perfect focus that is free of aberration. Because of the varying refractive index throughout the lens, incoming electromagnetic waves can travel in a curved path and be guided to focus at the back of the lens. The implementation of Luneburg lenses is often difficult due to the challenges in creating a medium with varying refractive index using normal materials. This problem can be overcome with the use of gradient index metamaterials. We report a two dimensional Luneburg lens made of gradient index metamaterials. It consists of 17 concentric shells with etched patterns on a printed circuit board working in microwave X band frequency. The broad properties of the Luneburg lens are then discussed.

© 2012 Optical Society of America

OCIS Codes
(110.2760) Imaging systems : Gradient-index lenses
(220.3630) Optical design and fabrication : Lenses
(350.6980) Other areas of optics : Transforms
(230.3205) Optical devices : Invisibility cloaks

ToC Category:
Imaging Systems

Original Manuscript: September 19, 2011
Revised Manuscript: November 20, 2011
Manuscript Accepted: November 30, 2011
Published: March 7, 2012

Yoke Leng Loo, Yarong Yang, Ning Wang, Yun Gui Ma, and Chong Kim Ong, "Broadband microwave Luneburg lens made of gradient index metamaterials," J. Opt. Soc. Am. A 29, 426-430 (2012)

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