Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Abstract

A metasurface is a planar structure that can flexibly control the polarization, phase, and amplitude of incident electromagnetic waves. An all‐dielectric hexagonal cell structure to reduce the interaction between cells and achieve efficient parametric regulation of electromagnetic waves is proposed. The single resonant transmission phase and the geometric phase are superimposed to realize the composite phase unit structure and construct a multifunctional flat metasurface device. The designed metasurface can flexibly tune the phase and polarization of incident electromagnetic waves and enable multifunctional integration phenomena, such as polarization separation, light intensity convergence, and vector light generation, on a single metasurface.

3D Dirac Semimetal Supported Tunable Multi‐Frequency Terahertz Metamaterial Absorbers

“…[6,7] With artificial subwavelength resonators arranged periodically, metamaterials (MMs) exhibit unique and excellent electromagnetic characteristics, such as negative refractive index. [8][9][10][11][12][13][14] For example, based on an electric ring resonator and split wire hybrid structure, N. I. Landy et al proposed a metamaterial perfect absorber consisting of subwavelength metal patterns, a dielectric layer, and a metal substrate in 2008, and experimentally achieved an absorption peak of ≈90% in the microwave region. [15] However, due to the limitations of the fixed geometric parameters and material properties of metals, the characteristics and application of the metamaterial absorbers (MMAs) are restrained.…”