Thermal Tuning of Surface Plasmon Polaritons Using Liquid Crystals

Authors

  • Arif E. Cetin,

    1. Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts, USA
    2. Bioengineering Department, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
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  • Alket Mertiri,

    1. Division of Materials Science and Engineering, Boston University, Boston, Massachusetts, USA
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  • Min Huang,

    1. Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts, USA
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  • Shyamsunder Erramilli,

    1. Division of Materials Science and Engineering, Boston University, Boston, Massachusetts, USA
    2. Department of Physics, Boston University, Boston, Massachusetts, USA
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  • Hatice Altug

    Corresponding author
    1. Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts, USA
    2. Division of Materials Science and Engineering, Boston University, Boston, Massachusetts, USA
    3. Bioengineering Department, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
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Abstract

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A thermally controlled plasmonic substrate supporting surface plasmon polaritons in contact with a liquid crystal medium is presented. The platform offers a spectral tuning range ∼18.7 nm by controlling the refractive index of the liquid crystal medium within the nematic phase in a temperature range of 18 °C. The abrupt transition between nematic and isotropic phases also enables a spectral tuning as large as 12 nm with only ∼1 °C.

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