CUED Publications database

Metamaterial filter for the near-visible spectrum

Butt, H and Dai, Q and Lal, NN and Butler, T and Wilkinson, TD and Amaratunga, GAJ (2012) Metamaterial filter for the near-visible spectrum. Applied Physics Letters, 101. -.

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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.

Item Type: Article
Divisions: Div B > Photonics
Depositing User: Cron job
Date Deposited: 16 Jul 2015 14:32
Last Modified: 26 Nov 2015 11:34
DOI: 10.1063/1.4747323