Chiral All-Dielectric Metasurface Based on Elliptic Resonators with Circular Dichroism Behavior

Abstract

We present the design of a new microwave all-dielectric chiral metasurface with circular dichroism behavior based on elliptic dielectric resonators (EDRs). During the design procedure, we have first optimized numerically the effects of the main design parameters such as the resonator's size and orientation, as well as the size of the slot within them, on the metasurface transmission over the frequency band 10-20 GHz. Measurements on the final metasurface prototype have shown a large circular dichroism (Δ = 0 61 and Δ = 0 5) over two bands .05 GHz) with ellipticities close to 45°which means that the developed device can be used as a circular polarization filter and circular polarizer at microwave frequencies.

Reconfigurability analysis of an all‐dielectric thermal microfluidic‐based metasurface

“…This principle led to the development of numerous applications using metasurfaces such as metalenses, 5,6 broadband polarization converters, 7‐9 THz sensors, 2 holograms, 10,11 beam steering, 12,13 and absorbers, 7,14,15 to name a few. All‐dielectric metasurfaces, providing additional advantages of low losses, have gained a lot of attention for the development of reconfigurable metasurfaces 2‐4,16‐18 . The dynamic control of the variations in transmission and reflection properties of the meta‐atom unit cells is possible in reconfigurable metasurfaces.…”

“…All-dielectric metasurfaces, providing additional advantages of low losses, have gained a lot of attention for the development of reconfigurable metasurfaces. [2][3][4][16][17][18] The dynamic control of the variations in transmission and reflection properties of the meta-atom unit cells is possible in reconfigurable metasurfaces. This is possible due to conventional approaches including the integration of active components such as diodes, integrated circuits (IC), and MEMS.…”

Design of Reconfigurable Micro fluidic Met surface with Different Semiconductor Alloys

“…The arrangement of sub-wavelength elements in a periodic fashion alters the magnitude, phase, and polarization of the illuminating EM waves. This leads to the design of various polarization converters and filters [1][2][3][4], optical networks [3,5], reconfigurable communication systems [1,3,6,7], electronic beam steering, bandwidth, and gain enhancement of antennas [3,7,8] using metasurfaces. Reconfigurable nature of the metasurface is achieved by varying the impedance characteristics of elementary units of metasurfaces by using internal or external stimulus.…”

A Full-Dielectric Chiral Material Based on a Honeycomb Structure

“…In this work, we have performed an electromagnetic analysis of a full-dielectric chiral honeycomb made by two layers, the second one being the specular image of the first one (see Figure 1). An all-dielectric implementation of a chiral structure may be particularly attractive due to their low losses, in comparison with implementations based on metal-dielectric interfaces [28].…”