Realization of a multi-band terahertz metamaterial absorber using two identical split rings having opposite opening directions connected by a rectangular patch

Wang, Ben‐Xin; Xu, Wei; Wu, Yue; Yang, Zhuchuang; Lai, Shengxiong; Lu, Liya

doi:10.1039/d1na00789k

Cited by 72 publications

(25 citation statements)

References 41 publications

(184 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tungsten acts as a metal blocking layer at the bottom of the MA, preventing waves from propagating through it [ 50 ]. The blocking capability of EM waves can be understood by skin depth

, where wavelength is proportional to skin depth.…”

Section: Results Analysismentioning

confidence: 99%

Polarization Independent Metamaterial Absorber with Anti-Reflection Coating Nanoarchitectonics for Visible and Infrared Window Applications

et al. 2022

View full text Add to dashboard Cite

The visible and infrared wavelengths are the most frequently used electromagnetic (EM) waves in the frequency spectrum; able to penetrate the atmosphere and reach Earth’s surface. These wavelengths have attracted much attention in solar energy harvesting; thermography; and infrared imaging applications for the detection of electrical failures; faults; or thermal leakage hot spots and inspection of tapped live energized components. This paper presents a numerical analysis of a compact cubic cross-shaped four-layer metamaterial absorber (MA) structure by using a simple metal-dielectric-metal-dielectric configuration for wideband visible and infrared applications. The proposed MA achieved above 80% absorption in both visible and near-infrared regions of the spectrum from 350 to 1250 nm wavelength with an overall unit cell size of 0.57λ × 0.57λ × 0.59λ. The SiO2 based anti-reflection coating of sandwiched tungsten facilitates to achieve the wide high absorption bandwidth. The perceptible novelty of the proposed metamaterial is to achieve an average absorptivity of 95.3% for both visible and infrared wavelengths with a maximum absorptivity of 98% from 400 nm to 900 nm. Furthermore, the proposed structure provides polarization insensitivity with a higher oblique incidence angle tolerance up to 45°.

show abstract

“…Tungsten acts as a metal blocking layer at the bottom of the MA, preventing waves from propagating through it [ 50 ]. The blocking capability of EM waves can be understood by skin depth

, where wavelength is proportional to skin depth.…”

Section: Results Analysismentioning

confidence: 99%

Polarization Independent Metamaterial Absorber with Anti-Reflection Coating Nanoarchitectonics for Visible and Infrared Window Applications

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Due to the inadequate facilities, the metasurface device could not be fabricated. However, the metasurface polarization converter can be fabricated using ultraviolet (UV) lithography and lift-off process [47,48]. The steps are given below: 1) At first, a supporting substrate (Si or Ti) needs to fabricate by the e-beam evaporation process so that the whole structure of the metasurface can be fabricated onto it.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Metasurface Polarization Converter at Far-Infrared Range

2022

View full text Add to dashboard Cite

Controlling the polarization state is an efficient way to enhance the functionalities in sensing, imaging, and communication systems in the microwave and terahertz (THz) spectrum. This study proposed an anisotropic metasurface and numerically explained it as a highly efficient polarization conversion using far-infrared frequency. Structural design, optimization, and results examination of the metasurface are performed using the CST microwave studio electromagnetic simulator. The metasurface was developed surrounding the two individual arrow-shaped metal resonators with two bar resonators on the opposite angular side of the arrow. Aluminum (Al) was used as a metallic resonator, while gallium arsenide (GaAs) was as the substrate. The interference theory was used to describe the co-polarized and cross-polarized reflectance coefficients, where two different mediums and interference layers were considered along with the reflected and transmitted wave. The polarization conversion efficiency yielded over 90% from 282.9 to 302.3 µm (0.987–1.062 THz) and 558.78 to 676.7 µm (0.442–0.537 THz) indicating multiple resonances at 286.7, 298.25, 586.1, and 689.55 µm. In conclusion, the performances and diverse characteristics of the designed metasurface demonstrated potential applications in the far-infrared spectrum as an efficient polarization converter application.

show abstract

Section: Design Strategies Of Broadband Metamaterials Absorbersmentioning

confidence: 99%

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Wang

Duan

et al. 2023

Adv Funct Materials

Self Cite

111

View full text Add to dashboard Cite

Metamaterial absorbers have been widely studied and continuously concerned owing to their excellent resonance features of ultra-thin thickness, light-weight, and high absorbance. Their applications, however, are typically restricted by the intrinsic dispersion of materials and strong resonant features of patterned arrays (mainly referring to narrow absorption bandwidth). It is, therefore essential to reassert the principles of building broadband metamaterial absorbers (BMAs). Herein, the research progress of BMAs from principles, design strategies, tunable properties to functional applications are comprehensively and deeply summarized. Physical principles behind broadband absorption are briefly discussed, typical design strategies in realizing broadband absorption are further emphasized, such as top-down lithography, bottom-up self-assembly, and emerging 3D printing technology. Diversified active components choices, including optical response, temperature response, electrical response, magnetic response, mechanical response, and multi-parameter responses, are reviewed in achieving dynamically tuned broadband absorption. Following this, the achievements of various interdisciplinary applications for BMAs in energy-harvesting, photodetectors, radar-IR dual stealth, bolometers, noise absorbing, imaging, and fabric wearable are summarized. Finally, the challenges and perspectives for future development of BMAs are discussed.

show abstract

Realization of a multi-band terahertz metamaterial absorber using two identical split rings having opposite opening directions connected by a rectangular patch

Abstract: Multiple-band metamaterial absorber at terahertz regime using periodically arranged surface structure placed on ultra-thin thickness of insulating dielectric slab backed by a metallic ground plane is demonstrated in this paper....

Cited by 72 publications

References 41 publications

Polarization Independent Metamaterial Absorber with Anti-Reflection Coating Nanoarchitectonics for Visible and Infrared Window Applications

Polarization Independent Metamaterial Absorber with Anti-Reflection Coating Nanoarchitectonics for Visible and Infrared Window Applications

Highly Efficient Metasurface Polarization Converter at Far-Infrared Range

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Contact Info

Product

Resources

About