Metamaterial filter for the near-visible spectrum
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
External organisations
- Lot 14, Zone A, EPZ
- University of Cambridge
- Department of Chemical Engineering
- Sri Lanka Institute of Nanotechnology (SLINTEC)
- Nanophotonics Centre
- Cavendish Laboratory
- EPZ
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.
Details
Original language | English |
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Article number | 083106 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 8 |
Publication status | Published - 20 Aug 2012 |