Index-tunable terahertz metamaterials based on double-layered closed-ring resonator arrays

Yuki Watanabe; Tatsunosuke Matsui

doi:10.1117/1.JPE.8.032211

3 May 2018 Index-tunable terahertz metamaterials based on double-layered closed-ring resonator arrays

Yuki Watanabe, Tatsunosuke Matsui

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Journal of Photonics for Energy, Vol. 8, Issue 3, 032211 (May 2018). https://doi.org/10.1117/1.JPE.8.032211

Abstract

We demonstrate index-tunable metamaterials working in the terahertz (THz) frequency range based on double-layered closed-ring resonator (CRR) arrays. The double-layered CRR arrays have a narrow-band transmission peak in a relatively wide stop band, and that peak shows spectral shift by slightly shifting relative position of the arrays or changing dielectric constant of the dielectric media inserted between CRR arrays. We show by numerical simulations that the effective refractive index can be widely tuned from un-naturally high positive to near-zero and negative values. Our approach may be utilized to develop THz active devices.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Yuki Watanabe and Tatsunosuke Matsui "Index-tunable terahertz metamaterials based on double-layered closed-ring resonator arrays," Journal of Photonics for Energy 8(3), 032211 (3 May 2018). https://doi.org/10.1117/1.JPE.8.032211

Received: 6 February 2018; Accepted: 3 April 2018; Published: 3 May 2018

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