Optical Mode Control of Anisotropic Quasicrystal Metasurface

Igor Yulevich Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel Elhanan Maguid Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel Nir Shitrit Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel Dekel Veksler Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel Vladimir Kleiner Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel Erez Hasman Mechanical Enginnering, Technion-Israel Institute of Technology, Haifa, Israel

The excitation of unique thermal radiative collective modes from a quasicrystalline metasurface consisting of anisotropic nanoantennas is presented. These discrete states appear as a result of the geometric phase induced by aperiodic orientations of the antennas. The observed modes manifest significantly different dispersion in comparison to a similar metasurface composed of isotropic nanoantennas, where only their positions determine the reciprocal space. Consideration of the geometric phase may be implemented in crystallographic analysis of complex systems as it provides extra information about the local anisotropy of material building-blocks.

igory@technion.ac.il