Fabrication and performance of TiO2-ceramic-based metamaterials for terahertz frequency range

Keisuke Takano; Yuya Yakiyama; Kyoji Shibuya; Keita Izumi; Hiroshi Miyazaki; Yoji Jimba; Fumiaki Miyamaru; Hideaki Kitahara; Masanori Hangyo

doi:10.1109/TTHZ.2013.2285521

Fabrication and performance of TiO₂-ceramic-based metamaterials for terahertz frequency range

Keisuke Takano, Yuya Yakiyama, Kyoji Shibuya, Keita Izumi, Hiroshi Miyazaki, Yoji Jimba, Fumiaki Miyamaru, Hideaki Kitahara, Masanori Hangyo

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

A two-dimensional dielectric metamaterial composed of a TiO₂ cube array is fabricated, and its performance is characterized in the terahertz region. The effective electromagnetic parameters are retrieved from the complex transmission and reflection coefficients of the sample, obtained using terahertz time-domain spectroscopy. The retrieved parameters show negative permeability and permittivity at around 0.28 and 0.38 THz, respectively. We also show via simulations that negative refractive index metamaterials can be realized by combining two sets of TiO₂ cubes of appropriate sizes. We also propose and fabricate composite structures made of TiO₂ spheres and a metal mesh to obtain a negative refractive index. The observed transmission band is attributed to the negative refractive index. TiO₂ is a promising material for fabricating negative refractive index metamaterials for the terahertz frequency region.

Original language	English
Article number	6658918
Pages (from-to)	812-819
Number of pages	8
Journal	IEEE Transactions on Terahertz Science and Technology
Volume	3
Issue number	6
DOIs	https://doi.org/10.1109/TTHZ.2013.2285521
Publication status	Published - 2013 Nov

Keywords

Dielectric spheres
metamaterials
negative refractive index
terahertz

ASJC Scopus subject areas

Radiation
Electrical and Electronic Engineering

Access to Document

10.1109/TTHZ.2013.2285521

Cite this

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title = "Fabrication and performance of TiO2-ceramic-based metamaterials for terahertz frequency range",

abstract = "A two-dimensional dielectric metamaterial composed of a TiO2 cube array is fabricated, and its performance is characterized in the terahertz region. The effective electromagnetic parameters are retrieved from the complex transmission and reflection coefficients of the sample, obtained using terahertz time-domain spectroscopy. The retrieved parameters show negative permeability and permittivity at around 0.28 and 0.38 THz, respectively. We also show via simulations that negative refractive index metamaterials can be realized by combining two sets of TiO2 cubes of appropriate sizes. We also propose and fabricate composite structures made of TiO2 spheres and a metal mesh to obtain a negative refractive index. The observed transmission band is attributed to the negative refractive index. TiO2 is a promising material for fabricating negative refractive index metamaterials for the terahertz frequency region.",

keywords = "Dielectric spheres, metamaterials, negative refractive index, terahertz",

author = "Keisuke Takano and Yuya Yakiyama and Kyoji Shibuya and Keita Izumi and Hiroshi Miyazaki and Yoji Jimba and Fumiaki Miyamaru and Hideaki Kitahara and Masanori Hangyo",

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AU - Takano, Keisuke

AU - Yakiyama, Yuya

AU - Shibuya, Kyoji

AU - Izumi, Keita

AU - Miyazaki, Hiroshi

AU - Jimba, Yoji

AU - Miyamaru, Fumiaki

AU - Kitahara, Hideaki

AU - Hangyo, Masanori

PY - 2013/11

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AB - A two-dimensional dielectric metamaterial composed of a TiO2 cube array is fabricated, and its performance is characterized in the terahertz region. The effective electromagnetic parameters are retrieved from the complex transmission and reflection coefficients of the sample, obtained using terahertz time-domain spectroscopy. The retrieved parameters show negative permeability and permittivity at around 0.28 and 0.38 THz, respectively. We also show via simulations that negative refractive index metamaterials can be realized by combining two sets of TiO2 cubes of appropriate sizes. We also propose and fabricate composite structures made of TiO2 spheres and a metal mesh to obtain a negative refractive index. The observed transmission band is attributed to the negative refractive index. TiO2 is a promising material for fabricating negative refractive index metamaterials for the terahertz frequency region.

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KW - metamaterials

KW - negative refractive index

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