Abstract
The diffractive properties of gold films with a periodic lattice of sub-micron voids beneath the surface are investigated. It has been shown that nanoporous metal surfaces exhibit frequency-selective non-dispersive diffraction enhanced by Mie plasmons in nanovoids, which leads to absolute angular tolerance of the diffracted beam intensity that can be useful for a variety of applications covering angle-tolerant optical filters, deflectors, absorbers, and beam splitters. Diffraction spectra are measured and calculated to support these conclusions, showing good qualitative agreement.
Original language | English |
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Pages (from-to) | 11964-11971 |
Number of pages | 8 |
Journal | Optics Express |
Volume | 14 |
Issue number | 25 |
DOIs | |
Publication status | Published - 11 Dec 2006 |