Control Electromagnetic Waves Based on Multi-Layered Transparent Metasurface

Abstract

Metasurface was presented to be the two-dimensional analogs of metamaterials that regulate the beam by adjusting the phase and amplitude of the wavefront. By properly designing and arranging the metasurface elements to form an array, the singularity of the metasurface to the propagation direction of the electromagnetic wave beam can be controlled; such unique electromagnetic properties offer additional opportunities to innovate new antennas. In this paper, we present the design and numerical simulation of the multi-layered microwave metasurface. The structure is designed to control the phase change of the transmission wave by changing the size of the multi-layered transparent microwave metasurface unit. Numerical simulation results show that the specific degree deflection of the electromagnetic wave is achieved in the microwave band. The design expands the application of phase gradient metasurface in the microwave field and provides a new method for metasurface electromagnetic beam steering.

Reflective Focusing Based on Few-Layer Gradient Metasurface Element Array

“…Where f is the focal length, and λ 0 is the free-space wavelength [23,24]. A continuous curve of phase shift in the range of −168.5 • to 170.8 • , as shown in Figure 2, can be achieved by changing the width of the metallic patch layer.…”

All-dielectric electromagnetically induced transparency-like metasurface with breaking symmetric

“…Metasurfaces are the two-dimensional structure of metamaterials with a subwavelength scale unit cell with a periodic arrangement [1][2][3]. These exhibit anomalous electromagnetic properties that cannot be found in natural materials, like negative refractive [4,5], superlens [6,7], and reversals of both the Doppler shift and Cherenkov radiation effects.…”

The Orbital Angular Momentum Modes of the Bessel Vortex Beam are Modulated by using the Metasurface

“…The research shown that the interaction of electromagnetic waves with inhomogeneous or anisotropic media resulting in spin-orbital angular momentum conversion [6][7]. Metasurface is a two-dimensional material with spatial anisotropy, which converts SAM beams into OAM beams and generates central singularities by adjusting the wavefront phase and amplitude of electromagnetic waves [8][9]. An electromagnetic metasurface is designed and fabricated, and experimentally demonstrated to generate multiple orbital angular momentum vortex beam in radio frequency domain [10].…”