Metamaterial filter for the near-visible spectrum

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
254 Downloads (Pure)


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.

Original languageEnglish
Article number083106
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 20 Aug 2012

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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