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Dynamic Modulation of Photonic Bandgaps in Crystalline Colloidal Arrays Under Electric Field

Authors

  • Tae Soup Shim,

    1. National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea)
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  • Shin-Hyun Kim,

    1. National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea)
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  • Jae Young Sim,

    1. National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea)
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  • Jong-Min Lim,

    1. National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea)
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  • Seung-Man Yang

    Corresponding author
    1. National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea)
    • National Creative Research Initiative Center for Integrated, Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305–701 (Korea).
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Abstract

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Dynamic modulation of photonic bandgaps in crystalline colloidal arrays is achieved by application of electric field. Highly charged polystyrene particles spontaneously create the crystal lattice, which is compressed or relaxed under external electric field by electrokinetic force. As a result, structural color of colloidal crystals as a photonic bandgap can be tuned or fixed with unprecedentedly fast and precise manner.

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