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Opt Express. 2008 Aug 4;16(16):11802-7.

Optical planar chiral metamaterial designs for strong circular dichroism and polarization rotation.

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  • 1Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA.


Planar chiral metamaterials comprising double-layer dielectricmetal- dielectric resonant structures in the shape of a gammadion are presented in the near-infrared regime. The unit cell of the doubly-periodic metamaterial design is optimized using the genetic algorithm for maximum circular dichroism and for maximum optical activity. A circular dichroism value in excess of 50% is predicted for the optimized design. Maximum polarization rotatory powers in terms of the minimum allowed transmittances are also obtained and presented.

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