CUED Publications database

Metamaterial filter for the near-visible spectrum

Butt, H and Dai, Q and Lal, NN and Wilkinson, TD and Baumberg, JJ and Amaratunga, GAJ (2012) Metamaterial filter for the near-visible spectrum. Applied Physics Letters, 101. ISSN 0003-6951

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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. © 2012 American Institute of Physics.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron job
Date Deposited: 04 Feb 2015 22:11
Last Modified: 30 Mar 2015 01:31
DOI: 10.1063/1.4747323