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Tunable Plasmonic Absorber Based on TiN-Nanosphere Liquid Crystal Hybrid in Visible and Near-Infrared Regions

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Abstract

In this paper, a tunable plasmonic absorber based on TiN-nanosphere/liquid crystal (LC) nanocomposite in visible and near-infrared regions is proposed. TiN-nanosphere/LC nanocomposite is a combination of titanium nitride (TiN) nanospheres dispersed in a host of LC and plays the main role in post fabrication tunability. The proposed absorber has three more than 90% absorption peaks and the absorption tunability of about 76 nm. It is shown that TiN-nanospheres are able to support localized surface plasmon resonance (LSPR). The Maxwell-Garnett theory is utilized to approximate the permittivity of the composite structure. Also, the effect of geometric parameters on the absorption is studied. Moreover, a single sheet of graphene is utilized to compensate the decrement of the absorption caused by the geometric parameters.

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Authors and Affiliations

  1. Department of Electrical Engineering, Shiraz University of Technology, Shiraz, 7155713876, Iran

    Reza Rashiditabar, Najmeh Nozhat & Mohammad Sadegh Zare

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  1. Reza Rashiditabar
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  2. Najmeh Nozhat
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  3. Mohammad Sadegh Zare
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Correspondence to Najmeh Nozhat.

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Rashiditabar, R., Nozhat, N. & Zare, M.S. Tunable Plasmonic Absorber Based on TiN-Nanosphere Liquid Crystal Hybrid in Visible and Near-Infrared Regions. Plasmonics 13, 1853–1859 (2018). https://doi.org/10.1007/s11468-018-0699-1

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