Creating negative refractive identity via single-dielectric resonators

Abstract

From a periodic array of commercially available zirconia cubes, we demonstrate artificial magnetic and electric dipoles due to the combination of displacement currents and Mie resonance. By scaling the size and periodicity of these dielectric resonators, the corresponding magnetic and electric responses are shifted to the desired frequencies. To further overlap the magnetic and electric resonances in the same frequency, we create a negative refractive index medium (NRIM) from single-dielectric resonators. Comparing with the conventional NRIM comprised of metallic or two-dielectric resonators, these single-dielectric structures present the low-loss and isotropic characteristics, and possess a further advantage to facilitate practical applications.

Enriching the Symmetry of Maxwell Equations through Unprecedented Magnetic Responses of Artificial Metamaterials and Their Revolutionary Applications

“…However, it is inconvenient to fabricate NRIM for practical devices with either of these approaches owing to the multiple-step fabrication process. Therefore, Vendik and Gashinova have theoretically investigated the possibility that the effective isotropic negative refractive index medium is realizable through the use of two different dielectric sphere lattices embedded in a dielectric matrix [80], and in this regard, experimental verification has been completed recently [21,81]. The underlying physics is explicit since the magnetic fundamental resonance mode and electrical resonance mode can be overlapped by scaling the size and the lattice of the dielectric inclusions.…”

“…It has been shown that negative permeability can be accomplished through a variety of approaches: for instance, inductive patterns such as split-ring resonators as first proposed by Pendry [16], circuit loops connected to microelectronics [17], Swiss rolls [18], pairs of conducting elements called sandwich structures [19,20], high permittivity-based dielectric composites [21], and many others [22,23]. In these fields, researchers should craft intuitive representations identifying the factors that make possess negative permeability in a given frequency range, and also, researchers should compute the value of permeability according to so-called retrieval procedures within these artificial magnetic structures [24][25][26].…”

A band enhanced metamaterial absorber based on E-shaped all-dielectric resonators

“…Thus, it is very meaningful to carry out in-depth investigations on all-dielectric metamaterial absorbers. In recent years, the research of dielectric metamaterials has witnessed remarkable progresses in theory, [16][17][18][19][20] experiment, [21][22][23] and applications. [24][25][26][27][28] These provide a good foundation for the study of dielectric metamaterial absorbers.…”

Coupling Effect for Dielectric Metamaterial Dimer

“…On the other hand, artificial magnetism can be also produced via Mie resonance of dielectric particles with relative high permittivity [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. From Mie theory [24][25][26], it can be analytically demonstrated that the electromagnetic wave interaction of dielectric particles may exhibit a strong magnetic or electric resonances.…”

“…From the oscillation of resulting magnetic/electric dipole, negative permeability/permittivity may be produced. Compared to conventional planar SRR and related structures, Mie resonance metamaterial does not suffer from conductive currents and capacitance gap, so that it can be expected to generate low loss isotropic metamaterial structure [35][36][37][38][39][40][41]. This advantage is more remarkable at THz and optical regime owing to the limitation of high inductive loss and kinetic inductance of electrons [38][39][40].…”