1. Giant Chiral Optical Response from a Twisted-Arc Metamaterial.
- Author
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Cui, Yonghao, Kang, Lei, Lan, Shoufeng, Rodrigues, Sean, and Cai, Wenshan
- Subjects
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METAMATERIALS , *OPTICAL properties , *CHIRALITY , *THICKNESS measurement , *CIRCULAR dichroism , *NEAR infrared radiation , *OPTICAL rotation - Abstract
We demonstrate enormously strongchiral effects from a photonicmetamaterial consisting of an array of dual-layer twisted-arcs witha total thickness of ∼λ/6. Experimental results reveala circular dichroism of ∼0.35 in the absolute value and a maximumpolarization rotation of ∼305°/λ in a near-infraredwavelength region. A transmission of greater than 50% is achievedat the frequency where the polarization rotation peaks. Retrievedparameters from measured quantities further indicate an actual opticalactivity of 76° per λ and a difference of 0.42 in the indicesof refraction for the two circularly polarized waves of opposite handedness. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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