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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24912–24921

Compact dual-band circular polarizer using twisted Hilbert-shaped chiral metamaterial

He-Xiu Xu, Guang-Ming Wang, Mei Qing Qi, Tong Cai, and Tie Jun Cui  »View Author Affiliations

Optics Express, Vol. 21, Issue 21, pp. 24912-24921 (2013)

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Abstract: We propose a kind of chiral metamaterial inspired from the fractal concept. The Hilbert fractal perturbation in the twisted split ring resonator element results in compact metamaterial and breaking mirror symmetry, which readily forms chirality over triple bands. The discrepancy between co-polarization conversion and cross-polarization conversion over multiple bands can be explored for multifunctional devices. A multiband circular polarizer is then numerically and experimentally studied in the X band based on the bilayered twisted Hilbert resonator with mutual 90° rotation. The ability of transforming linearly polarized incident waves to circularly polarized waves is unambiguously demonstrated with high conversion efficiency and large polarization extinction ratio of more than 20 dB across dual bands. Moreover, exceptionally strong optical activity and circular dichroism are also observed.

© 2013 Optical Society of America

OCIS Codes
(260.5430) Physical optics : Polarization
(260.5740) Physical optics : Resonance
(160.1585) Materials : Chiral media
(160.3918) Materials : Metamaterials

ToC Category:

Original Manuscript: September 4, 2013
Manuscript Accepted: September 27, 2013
Published: October 10, 2013

He-Xiu Xu, Guang-Ming Wang, Mei Qing Qi, Tong Cai, and Tie Jun Cui, "Compact dual-band circular polarizer using twisted Hilbert-shaped chiral metamaterial," Opt. Express 21, 24912-24921 (2013)

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