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Tunable Circular Dichroism of Achiral Graphene Plasmonic Structures

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Abstract

Graphene bilayered split rings (BSRs) are proposed to generate tunable circular dichroism (CD). BSRs with traditional materials do not elicit the CD effect because of C4 symmetry. By contrast, BSRs with graphene can achieve the CD effect by varying the Fermi energy of each part of the split rings. The CD signal can be reversed from positive to negative or vice versa by exchanging the Fermi energy. CD effects can also be tuned by varying the Fermi energies of the different parts. This phenomenon indicates that the chirality of BSRs gradually change as the Fermi energy varies. This concept provides a method to change chirality and dynamically vary the CD effect without rebuilding the structures.

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Acknowledgments

This work was supported by National Natural Foundation of China (Grant No. 61575117), the Fundamental Research Funds for the Central Universities (GK201303007), excellent doctor degree dissertation of Shaanxi Normal University (X2014YB08), and Innovation Funds of Graduate Programs of Shaanxi Normal University (2016CSZ013).

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Authors and Affiliations

  1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an, 710062, China

    Tiankun Wang, Yongkai Wang, Lina Luo, Li Wang & Zhongyue Zhang

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  1. Tiankun Wang
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  2. Yongkai Wang
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  3. Lina Luo
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  4. Li Wang
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  5. Zhongyue Zhang
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Correspondence to Zhongyue Zhang.

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Wang, T., Wang, Y., Luo, L. et al. Tunable Circular Dichroism of Achiral Graphene Plasmonic Structures. Plasmonics 12, 829–833 (2017). https://doi.org/10.1007/s11468-016-0331-1

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  • DOI: https://doi.org/10.1007/s11468-016-0331-1

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