Metamaterial filter for the near-visible spectrum

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

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


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 languageBritish English
Article number083106
JournalApplied Physics Letters
Issue number8
StatePublished - 20 Aug 2012


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