2017/09/30 by Alex M. H. Wong, Alex M. H. Wong, George V. Eleftheriades · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Advanced Wireless Communication Technologies #Bipartite graph #Coupling (piping) #Electromagnetic radiation #Interference (communication) #Lossless compression #Metamaterials and Metasurfaces Applications #Power (physics) #Reflection (computer programming) #Reflection coefficient #physics.app-ph
paper · pdf · doi:10.1103/physrevx.8.011036
published as Phys. Rev. X 8, 011036 (2018)
openalex created_date 2017/09/25 · arxiv created 2018/01/15 · openalex publication_date 2018/02/28 · arxiv updated 2018/03/07 · openalex updated_date 2026/08/05
In this paper, we propose a new metasurface that is able to reflect a known incoming electromagnetic wave into an arbitrary direction, with perfect power efficiency. This seemingly simple task, which we hereafter call perfect anomalous reflection, is actually highly nontrivial because of the differing wave impedances and complex interference between the incident and reflected waves. Heretofore, proposed metasurfaces that achieve perfect anomalous reflection require complicated, deeply subwavelength and/or multilayer element structures, which allow them to couple to and from leaky and/or evanescent waves. In contrast, we demonstrate that using a bipartite Huygens' metasurface (BHM)-a passive and lossless metasurface with only two cells per period-perfect anomalous reflection can be achieved over a wide angular and frequency range. Through simulations and experiments at 24 GHz, we show that a properly designed BHM can anomalously reflect an incident electromagnetic wave from i 50to r -22.5, with perfect power efficiency to within experimental precision.