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Tunable broadband plasmonic perfect absorber at visible frequency

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Abstract

Metamaterials and plasmonics as a new pioneering field in photonics joins the features of photonics and electronics by coupling photons to conduction electrons of a metal as surface plasmons (SP). This concept has been implemented for a variety of applications including negative index of refraction, magnetism at visible frequency, cloaking devices amongst others. In the present work, we used plasmonic hybrid material in order to design and fabricate a broad-band perfect plasmonic metamaterial absorber in a stack of metal and Copper-PTFE (Polytetrafluoroethylene) nanocomposite showing an average absorbance of 97.5 % in the whole visible spectrum. Our experimental results showed that the absorption peak of the stacks can be tuned upon varying the thickness and type of the spacer layer due to the sensitivity of plasmon resonance to its environment. To the best of our knowledge, this is the first report of a plasmonic metamaterial absorber based on copper with absorption around 100 % in the entire visible and near-Infrared (NIR).

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Acknowledgements

Funding by the German Research Foundation (DFG) through the projects EL 554/1-1 and SFB 677 (C1, C9) are acknowledged. M.E. would like to thank the Initiative and Networking Fund of the Helmholtz Association’s (grant No. VH-NG-523) for providing the financial base for the start-up of his research group. The authors acknowledge V.S.K. Chakravadhanula for taking the TEM image.

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Authors and Affiliations

  1. Nanochemistry and Nanoengineering, Institute for Materials Science, Faculty of Engineering, University of Kiel, Kaiserstrasse 2, 24143, Kiel, Germany

    Mehdi Keshavarz Hedayati & Mady Elbahri

  2. Multicomponent Materials, Institute for Materials Science, Faculty of Engineering, University of Kiel, Kaiserstrasse 2, 24143, Kiel, Germany

    Franz Faupel

  3. Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Nanochemistry and Nanoengineering, Max-Planck-Str. 1, 21502, Geesthacht, Germany

    Mady Elbahri

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  1. Mehdi Keshavarz Hedayati
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  2. Franz Faupel
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Correspondence to Mady Elbahri.

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Hedayati, M.K., Faupel, F. & Elbahri, M. Tunable broadband plasmonic perfect absorber at visible frequency. Appl. Phys. A 109, 769–773 (2012). https://doi.org/10.1007/s00339-012-7344-1

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  • DOI: https://doi.org/10.1007/s00339-012-7344-1

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