Wavefront manipulation based of the excitation of bound states in dielectric photonic crystals and bilayer metasurfaces

2019/08/19 by Anna C. Tasolamprou, Tasolamprou, Anna C., Maria Kafesaki +5
Physics and Astronomy · Materials Science · Engineering · #Photonic Crystals and Applications #Metamaterials and Metasurfaces Applications #Plasmonic and Surface Plasmon Research

paper · pdf · doi:10.48550/arxiv.1908.06691

Abstract

We present the study of bound surface modes sustained at the termination of truncated bulk dielectric photonic crystals and isolated metasurfaces of dielectric meta-atoms. We discuss the origins of bound modes in the two systems and their relation. For both systems, we theoretically study and experimentally demonstrate wavefront manipulation, in particular directional emission, frequency splitting and beam collimation achieved by coupling of the bound states to radiation modes through leaky wave radiation mechanism using properly designed scattering gratings.

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