2016/09/26 by Ana Díaz‐Rubio, Díaz-Rubio, Ana, Viktar Asadchy +5 · 5 citations
Engineering · Materials Science · #Advanced Antenna and Metasurface Technologies #Advanced Materials and Mechanics #Antenna Design and Analysis #FOS: Physical sciences #Metamaterials and Metasurfaces Applications #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.1609.08041
openalex publication_date 2016/09/26 · openalex created_date 2022/03/05 · openalex updated_date 2026/07/28
The use of the generalized Snell's law opens wide possibilities for the\nmanipulation of transmitted and reflected wavefronts. However, known structures\ndesigned to shape reflection wave fronts suffer from significant parasitic\nreflections in undesired directions: In fact, the desired field distributions\ndo not satisfy Maxwell's equations if the boundary conditions are specified in\naccordance with the generalized Snell's law. In this work, we explore the\nlimitations of the existing solutions for the design of passive planar\nreflectors and demonstrate that strongly non-local response is required for\nperfect performance. Ideal reflective surfaces capable of steering the energy\ninto any desired direction have to localize and carry energy along the\ninhomogeneous reflective surface. A new paradigm for the design of perfect\nreflectors based on energy surface channeling is introduced. We realize and\nexperimentally verify a theoretically perfect design of an anomalously\nreflective surface using an array of rectangular metal patches backed by a\nmetallic plate. This conceptually new mechanism for wavefront manipulation\nallows the design of thin perfect reflectors, offering a versatile design\nmethod applicable to other scenarios such as focusing reflectors or surface\nwave manipulations, extendible to other frequencies.\n