2012/11/07 by Tapashree Roy, Edward T. F. Rogers, Nikolay I. Zheludev · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Metamaterials and Metasurfaces Applications #Orbital Angular Momentum in Optics #Plasmonic and Surface Plasmon Research #physics.optics
paper · pdf · doi:10.1364/oe.21.007577
arxiv created 2012/11/07 · openalex publication_date 2013/03/19 · arxiv updated 2015/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that a planar plasmonic metamaterial with spatially variable meta-atom parameters can focus transmitted light into sub-wavelength hot-spots located beyond the near-field of the metamaterial. By nano-structuring a gold film we created an array of meta-lenses generating foci of 160 nm (0.2λ) in diameter when illuminated by a wavelength of 800 nm. We attribute the occurrence of sub-wavelength hotspots beyond the near field to the phenomenon of superoscillation.