Incident Angle- and Polarization-Insensitive Metamaterial Absorber using Circular Sectors

Lee, Dongju; Hwang, Jung Gyu; Lim, Do Young; Hara, T.; Lim, Sungjoon

doi:10.1038/srep27155

Cited by 98 publications

(54 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because an arbitrarily polarized wave can be considered as a vector superposition of x-polarized and y-polarized waves. 16 In previously reported studies, the symmetry of a structure is usually based on multiple rotations of the substructure such as four-fold and eight-fold rotational symmetry structures, 3,15,16,21,[36][37][38][39][40] whereas the symmetry of our structure originates from the structure itself. Owing to the symmetry of our structure, it is predicted that its transmission response is polarization-independent.…”

Section: 33-35mentioning

confidence: 98%

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

et al. 2018

View full text Add to dashboard Cite

We numerically demonstrate that an electromagnetically induced transparent (EIT) all-dielectric metamaterial with properties of polarization-independence and incident angle insensitivity can be achieved in terahertz regimes. The metamaterial cell is composed of two bi-air-hole cubes (BCs) with different sizes. The two BCs function as superradiant and subradiant resonators, respectively. Based on Mie-type destructive interferences between dielectric resonators, the EIT effect is induced at around 8.25 THz with the transmission peak close to 0.95. Moreover, the "two-particle" model is introduced to describe the EIT effect and the influence of couplings between the two BCs on the transmission spectra.Analytical results are in good agreement with numerical simulation results. Owing to the symmetry and uniformity of the metamaterial structure, polarization-independent and angle-insensitive properties can be achieved. In addition, the slow light characteristic of the metamaterial is also verified. Such an EIT scheme may have potential applications in low-loss slow light devices and bandpass filters.

show abstract

Section: 33-35mentioning

confidence: 98%

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Lee et al have developed a narrowband absorber structure, where the top metallic pattern comprises a center square patch connected with four circular sectors around the patch [31]. The sectors are separated from one another through symmetric slots to realize the capacitive effect.…”

Section: Four Circular Sector-based Patch Geometrymentioning

confidence: 99%

Recent progress in angle-insensitive narrowband and broadband metamaterial absorbers

2019

Self Cite

View full text Add to dashboard Cite

Recent progress in angle-insensitive narrowband and broadband metamaterial absorbers is presented herein. Initially, a few narrowband structures are described along with their absorption mechanisms. A bandwidth-enhanced absorber, conceptually derived from the existing narrowband geometry, is also discussed. Finally, several broadband absorbers having wide absorption bandwidths across different microwave frequency ranges are illustrated. The reported structures are primarily designed to exhibit high angularly stable responses suitable for practical applications. Furthermore, their geometries are fourfold symmetric, thereby displaying polarization-independent characteristics. Experimental verifications of the designed absorbers have been confirmed under normal and oblique incidences. The angle insensitivity, polarization independence, flexible absorption bandwidths (from narrowband to broadband), and commercial feasibility of the reported structures might establish them as potential candidates for manifold absorber applications.

show abstract

“…We clearly observed that the SRCR with the via array shows more stable absorptivity compared with the SRCR without the via array. For a quantitative comparison, the angle-sensitivity (S A ) is defined as3031…”

Section: Unit Cell Designmentioning

confidence: 99%

Angle- and Polarization-Insensitive Metamaterial Absorber using Via Array

Lim

Lee

Lim

2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

In this paper, we propose an angle- and polarization-insensitive metamaterial absorber. We design a metamaterial unit cell that is based on a split ring cross resonator (SRCR). We observe that the absorption frequency and absorption ratio are insensitive to incident angles when a via array surrounds the SRR. We demonstrate the effect of the via array using full-wave simulations by comparing the absorptivity of the SRCR with and without the via array. Because of the symmetric geometry, we also realize polarization insensitivity. We build the proposed absorber on a printed-circuit-board with 30 × 30 unit cells, and we demonstrate its performance experimentally in free space. Under normal incidence, the fabricated absorber shows 99.6% absorptivity at 11.3 GHz for all polarization angles, while for oblique incidence, the fabricated absorber maintains an absorptivity higher than 90% for incident angles up to 70° and 60° for transverse magnetic (TM) and transverse electric (TE) modes, respectively.

show abstract

Incident Angle- and Polarization-Insensitive Metamaterial Absorber using Circular Sectors

Cited by 98 publications

References 21 publications

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

Recent progress in angle-insensitive narrowband and broadband metamaterial absorbers

Angle- and Polarization-Insensitive Metamaterial Absorber using Via Array

Contact Info

Product

Resources

About