Metamaterial filter for the near-visible spectrum

Haider Butt; Qing Dai; Niraj N. Lal; Timothy D. Wilkinson; Jeremy J. Baumberg; Gehan A.J. Amaratunga

doi:10.1063/1.4747323

Metamaterial filter for the near-visible spectrum

Haider Butt^*, Qing Dai, Niraj N. Lal, Timothy D. Wilkinson, Jeremy J. Baumberg, Gehan A.J. Amaratunga

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

We demonstrate metamaterials operating in the near-visible regime based on two-dimensional arrays of gold-coated silicon nanopillars. The nanopillar arrays demonstrate a cutoff response at the metamaterial plasma frequency in accordance with theory and can be utilized for filtering applications. A plasma frequency in the near visible region of λ = 1 μm is calculated numerically for an array with a lattice constant of 300 nm and wire radius of 50 nm, with reflection measurements in agreement with numerical calculations. Such structures can be utilized for achieving negative-index based metamaterials for the visible spectrum.

Original language	English
Article number	083106
Journal	Applied Physics Letters
Volume	101
Issue number	8
DOIs	https://doi.org/10.1063/1.4747323
Publication status	Published - 20 Aug 2012
Externally published	Yes

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abstract = "We demonstrate metamaterials operating in the near-visible regime based on two-dimensional arrays of gold-coated silicon nanopillars. The nanopillar arrays demonstrate a cutoff response at the metamaterial plasma frequency in accordance with theory and can be utilized for filtering applications. A plasma frequency in the near visible region of λ = 1 μm is calculated numerically for an array with a lattice constant of 300 nm and wire radius of 50 nm, with reflection measurements in agreement with numerical calculations. Such structures can be utilized for achieving negative-index based metamaterials for the visible spectrum.",

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AU - Dai, Qing

AU - Lal, Niraj N.

AU - Wilkinson, Timothy D.

AU - Baumberg, Jeremy J.

AU - Amaratunga, Gehan A.J.

PY - 2012/8/20

Y1 - 2012/8/20

N2 - We demonstrate metamaterials operating in the near-visible regime based on two-dimensional arrays of gold-coated silicon nanopillars. The nanopillar arrays demonstrate a cutoff response at the metamaterial plasma frequency in accordance with theory and can be utilized for filtering applications. A plasma frequency in the near visible region of λ = 1 μm is calculated numerically for an array with a lattice constant of 300 nm and wire radius of 50 nm, with reflection measurements in agreement with numerical calculations. Such structures can be utilized for achieving negative-index based metamaterials for the visible spectrum.

AB - We demonstrate metamaterials operating in the near-visible regime based on two-dimensional arrays of gold-coated silicon nanopillars. The nanopillar arrays demonstrate a cutoff response at the metamaterial plasma frequency in accordance with theory and can be utilized for filtering applications. A plasma frequency in the near visible region of λ = 1 μm is calculated numerically for an array with a lattice constant of 300 nm and wire radius of 50 nm, with reflection measurements in agreement with numerical calculations. Such structures can be utilized for achieving negative-index based metamaterials for the visible spectrum.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 083106

ER -

Metamaterial filter for the near-visible spectrum

Abstract

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