scholarly journals OBLIQUE INCIDENCE AND POLARIZATION INSENSITIVE MULTIBAND METAMATERIAL ABSORBER WITH QUAD PAIRED CONCENTRIC CONTINUOUS RING RESONATORS

2017 ◽  
Vol 60 ◽  
pp. 33-46 ◽  
Author(s):  
Alkesh Agrawal ◽  
Mukul Misra ◽  
Ashutosh Singh
Keyword(s):  
Oblique Incidence ◽  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Continuous Ring ◽  
Polarization Insensitive

scholarly journals Polarization insensitivity characterization of dual-band perfect metamaterial absorber for K band sensing applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Lutful Hakim ◽  
Touhidul Alam ◽  
Ali F. Almutairi ◽  
Mohd Fais Mansor ◽  
Mohammad Tariqul Islam
Keyword(s):  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Dual Band ◽  
Sensing Applications ◽  
Tm Mode ◽  
Polarization Insensitive ◽  
Transverse Electromagnetic ◽  
Polarization Insensitivity ◽  
K Band

AbstractPolarization insensitive metamaterial absorbers (MA) are currently very attractive due to their unique absorption properties at different polarization angles. As a result, this type of absorber is widely used in sensing, imaging, energy harvesting, etc. This paper presents the design and characterization of a dual-band polarization-insensitive metamaterial absorber (MA) for K-band applications. The metamaterial absorber consists of two modified split ring resonators with an inner cross conductor to achieve a 90% absorption bandwidth of 400 MHz (21.4–21.8 GHz) and 760 MHz (23.84–24.24 GHz) at transverse electromagnetic (TEM), transverse electric (TE), and transverse magnetic (TM) mode. Polarization insensitivity of different incident angles for TE and TM mode is also investigated, which reveals a similar absorption behavior up to 90°. The metamaterial structure generates single negative (SNG) property at a lower frequency of 21.6 GHz and double negative property (DNG) at an upper frequency of 24.04 GHz. The permittivity and pressure sensor application are investigated for the proposed absorber, which shows its useability in these applications. Finally, a comparison with recent works is also performed to demonstrate the feasibility of the proposed structure for K band application, like sensor, filter, invasive clock, etc.

Design of a polarization-insensitive wideband tunable metamaterial absorber based on split semi-circle ring resonators

2017 ◽  
Vol 122 (2) ◽  
pp. 025113 ◽  
Author(s):  
Shaonan An ◽  
Haibing Xu ◽  
Yulu Zhang ◽  
Song Wu ◽  
Jianjun Jiang ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Polarization Insensitive ◽  
Tunable Metamaterial

scholarly journals Ultrathin Dual-band Metamaterial Absorber

2021 ◽  
Author(s):  
Huan Liu ◽  
Rui Wang ◽  
Junyao Wang ◽  
Tianhong Lang ◽  
Bowen Cui
Keyword(s):  
Simple Structure ◽  
Structural Parameters ◽  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Dual Band ◽  
Absorption Mechanism ◽  
Split Ring ◽  
Absorption Frequency ◽  
Polarization Insensitive ◽  
High Absorption

Abstract In this paper, an ultrathin dual-band metamaterial absorber (MMA) is designed. Its top layer consists of two nested split-ring resonators. The calculation result demonstrates that there are two distinct absorption peaks, which are 9.258GHz and 21.336GHz, with absorption rate of 99.78% and 96.91%. It also show polarization-insensitive for normal incident and its thickness is only 1.96% of the wavelength of its lowest absorption frequency. Moreover, we explore the MMA’s absorption mechanism and analyze the influence of main structural parameters on the MMA’s absorption characteristics. The proposed MMA has simple structure and high absorption, it can be applied in electromagnetic stealth, bolometers, sensor and other fields.

scholarly journals Polarization-Independent and Angle-Insensitive Metamaterial Absorber Using 90-Degree-Rotated Split-Ring Resonators

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Jia-Qi Feng ◽  
Wei-Dong Hu ◽  
Qing-Le Zhang ◽  
Hua Zong ◽  
Hui Huang ◽  
...  
Keyword(s):  
Incident Angle ◽  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Naval Research ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Full Wave ◽  
X Band ◽  
Polarization Insensitive ◽  
Polarization Independent

We present the design, simulation, and measurement of a polarization-independent and angle-insensitive metamaterial absorber (MA) in X-band. Since the unit cell of the MA consists of four subwavelength split-ring resonators with 4-fold symmetric rotation, the MA is insensitive to the variation of both polarization and incident angle of the planar electromagnetic wave. The electromagnetic performances of the MA are studied by full-wave simulations based on finite-element method and the Naval Research Laboratory arch experimental measurements. The electric field distributions are numerically investigated, which confirm the polarization-insensitive property of the MA, as expected from the symmetric nature of the structure. When the incident angles vary from 0 to 45 degrees, the MA remains at full width at half maximum of 0.4 GHz (0.5 GHz) with peak absorptions of 99.9% (95.2%) at 10.27 GHz (10.3 GHz) by simulations (measurements).

An Octaband Polarization Insensitive Terahertz Metamaterial Absorber Using Orthogonal Elliptical Ring Resonators

Plasmonics ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 75-81
Author(s):  
V. K. Verma ◽  
S. K. Mishra ◽  
K. K. Kaushal ◽  
Lekshmi V ◽  
Sudhakar S ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Elliptical Ring ◽  
Polarization Insensitive

Extending the absorption band from infrared to ultraviolet using the ITO transition from reflection to transparence

2021 ◽  
Author(s):  
Fathi Bendelala ◽  
Ali Cheknane ◽  
Mohammed Benatallah ◽  
Jean-Michel Nunzi
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Oblique Incidence ◽  
Metamaterial Absorber ◽  
The Finite Element Method ◽  
Absorption Bandwidth ◽  
Dielectric Layers ◽  
Simulation Based ◽  
Polarization Insensitive

A numerical simulation based on the finite-element method shows that a metamaterial absorber using Tungsten (W) and Indium tin oxide (ITO) plasmonic metals can be ultra-broadband and high-performance. Conventional broadband absorbers usually consist of multiple metal-dielectric layers or multi-resonators and have a bulky shape. The present investigates the possibility to reach optimal characteristics with a simple design by combining two plasmonic materials (W/ITO) within a single resonator. Involving the ITO transition from reflection to transparence dramatically increases the absorption bandwidth, which is extended from infrared to ultraviolet, with up to 99.92% absorption. The design is polarization-insensitive under oblique incidence, up to 75° and 80°, for TE and TM polarization waves, respectively.

scholarly journals A THz Metamaterial Absorber with Multiple Polarization - Insensitive, Sensitive, and Tunable

2021 ◽  
Vol 19 (2) ◽  
pp. 165-173
Author(s):  
Ayesha Mohanty ◽  
Om Prakash Acharya ◽  
Bhargav Appasani ◽  
Kriangkrai Sooksood ◽  
Sushanta Kumar Mohapatra
Keyword(s):  
Terahertz Spectroscopy ◽  
Metamaterial Absorber ◽  
Ring Resonators ◽  
Polarization Angle ◽  
Visible Absorption ◽  
Dielectric Spacer ◽  
Frequency Regime ◽  
Multiple Characteristics ◽  
Polarization Characteristics ◽  
Polarization Insensitive

Terahertz (THz) absorbers are gaining interest in many applications. In this paper, we present the design and simulation of a multiband metamaterial absorber (MMA) with combined polarization properties and prominent absorption at 2.2 THz and 3.9 THz. The MMA comprises two square split-ring resonators and one square ring resonator placed on top of a polyimide dielectric spacer, offering multiband absorption characteristics with maximum absorptivity of 93.18% and 96.09%, respectively. The most protruding feature of this design is that it displays multiple polarization characteristics, including insensitivity, sensitivity, and tunability, even though the structure is similar to those of conventional absorbers. Firstly, the distinctly visible absorption spectra at 1.8 THz, gradually diminishes with an increase in polarization angle and then completely vanishes for TM polarization. Secondly, the prominent band at 2.2 THz is insensitive to changes in polarization of the incident wave, whereas, at 3.9 THz, the absorption band displays polarization tunability characteristics. Due to the multiple characteristics displayed by the structure, this MMA can be simultaneously used for several applications in the terahertz frequency regime such as imaging, terahertz spectroscopy, sensing, and stealth technology.

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