2011/12/23 by Xingjie Ni, Naresh Kumar Emani, Alexander V. Kildishev +2 · 8 citations
Engineering · Materials Science · Physics and Astronomy · #Plasmonic and Surface Plasmon Research #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications
paper · pdf · doi:10.1126/science.1214686
openalex publication_date 2011/12/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
The precise manipulation of a propagating wave using phase control is a fundamental building block of optical systems. The wavefront of a light beam propagating across an interface can be modified arbitrarily by introducing abrupt phase changes. We experimentally demonstrated unparalleled wavefront control in a broadband optical wavelength range from 1.0 to 1.9 micrometers. This is accomplished by using an extremely thin plasmonic layer (~λ/50) consisting of an optical nanoantenna array that provides subwavelength phase manipulation on light propagating across the interface. Anomalous light-bending phenomena, including negative angles of refraction and reflection, are observed in the operational wavelength range.