Giant chiral optical response from a twisted-arc metamaterial

Yonghao Cui, Lei Kang, Shoufeng Lan, Sean Rodrigues, Wenshan Cai

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    269 Scopus citations


    We demonstrate enormously strong chiral effects from a photonic metamaterial consisting of an array of dual-layer twisted-arcs with a total thickness of ∼λ/6. Experimental results reveal a circular dichroism of ∼0.35 in the absolute value and a maximum polarization rotation of ∼305 /λ in a near-infrared wavelength region. A transmission of greater than 50% is achieved at the frequency where the polarization rotation peaks. Retrieved parameters from measured quantities further indicate an actual optical activity of 76 per λ and a difference of 0.42 in the indices of refraction for the two circularly polarized waves of opposite handedness.

    Original languageEnglish (US)
    Pages (from-to)1021-1025
    Number of pages5
    JournalNano letters
    Issue number2
    StatePublished - Feb 12 2014

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • General Chemistry
    • General Materials Science
    • Condensed Matter Physics
    • Mechanical Engineering


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