Broadband and polarization-insensitive terahertz absorber based on multilayer metamaterials

He, Xiaodong; Yan, Shitao; Ma, Qixiang; Zhang, Qinfei; Jia, Peng; Wu, Fengmin; Jiang, Jiuxing

doi:10.1016/j.optcom.2014.11.068

Cited by 99 publications

(39 citation statements)

References 25 publications

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“…14,28 However, the best achieved normalized bandwidth of absorption over 90% to the central frequency of 1 and 2 THz is 98% and 88%, respectively. 14 In other works 14,[19][20][21][22][23][24][25] in which the device has been designed for achieving broadband or ultrabroadband absorption, this number is less than the best reported work. Khavasi 14 indicates that the design of ultrabroadband absorption in a higher frequency of THz spectra has some limitations, and it is not a simple task.…”

Section: Introductionmentioning

confidence: 97%

“…[6][7][8][9][10][11][12] However, the requirement of some applications is tunable narrowband THz absorbers, 13 while the requirement of the others is ultra-broadband absorbers, 14,15 and research in this area is ongoing. [16][17][18] Various geometrical structures including circular patches, 19 ring arrays, 20 graphene stacks, 21,22 rectangular fish-scale, 23 cascade metal-dielectric pairs, 24 and specific ring resonator 25 have been proposed to achieve ultra-wideband or broadband absorption. However, with all the works that have been down, providing a simple design approach to increase bandwidth along with fabrication issues is still challenging.…”

Section: Introductionmentioning

confidence: 99%

“…As a numerical example, we design an ultra-broadband absorber with the absorption over 121% for the central frequency of 1.66 THz, which is significantly larger than the best previous works. 14,[19][20][21][22][23][24][25] In addition, the proposed structure is really simple and can be manufactured by current manufacturing techniques like chemical vapor deposition (CVD). The remainder of this paper is organized as follows: In Section 2, the proposed structure is described, and the circuit model of the structure and the design approach are presented.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Aghaee

Orouji

2019

Int J Numerical Modelling

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The realization of broadband absorption in the terahertz spectra is of significant interest in advanced terahertz applications. In this work, a novel ultrabroadband absorber based on the periodic array of graphene disks and graphene continues sheet is proposed. A developed transmission line theory besides the analytical circuit model of graphene disks and graphene continues sheet are exploited to describe the absorber structure by its circuit model. By using three graphene layers and considering impedance matching concept, the normalized bandwidth of 90% absorption is extended up to 121% of the central frequency. Also, the dependence of the absorption spectra on the structure parameters is investigated and analyzed. Moreover, the performance of the device under possible fabrication errors is discussed. In pursuit of evaluating the efficiency, accuracy, and validity of the proposed method, full-wave numerical modeling is performed by the finite element method. The results show that the proposed circuit approach, in addition to having advantages in terms of computing time and the need for memory resource, is in a good agreement with the full-wave simulations. Furthermore, the structure of the absorber is relatively simple, and it can be manufactured by chemical vapor deposition techniques.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Aghaee

Orouji

2019

Int J Numerical Modelling

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“…In 2008, Landy et al proposed the first metamaterial-based absorber which can achieve perfect absorption at specified frequency point [1]. Since then, the metamaterial absorbers have been widely studied and their absorption spectra have covered the microwave [2,3], terahertz (THz) wave [4,5], infrared wave [6,7] and visible light [8,9]. Their advantages of ultra-thin and high-absorption provide possibility of improving the stealth performance of specific equipment [10].…”

Section: Introductionmentioning

confidence: 99%

Skew symmetric structure for ultra-broadband electromagnetic absorbing

Lin

Chen

et al. 2019

J. Phys. Commun.

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The paper reports the concept and design of skew symmetric structure which can achieve perfect electromagnetic absorbing in ultra-broad frequency range with the entire thickness being only 1/12 of the absorption wavelength. To prove the validity, a broadband absorber based on the structure is designed. Its absorptivity is more than 90% from 11.51 GHz to 23.75 GHz and the relative absorption bandwidth reach 69.4%. The characteristics are insensitive to the type and thickness of the metals of the structure. It keeps broadband absorption with high absorptivity in the case of oblique incidence. Besides, the design of the skew symmetric structure can be applied to other wavebands. A terahertz absorber based on the structure is proposed to demonstrate the effectiveness. It can broaden the bandwidth to about 43 times that of the traditional square-ring metamaterial terahertz absorber and the thickness is only 1/12 of the absorption wavelength (4.34 μm).proposed structure is 43 times that of the traditional structure. The entire thickness is only 4.34 μm, which is 1/ 12 of the wavelength (at 5.78 THz).

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“…In recent years, various structures, such as split rings [11], closed rings [12], and fishnet structures [13], have been proposed for MAs. A certain progress has been made in broadband MAs developing [14,15]. Meanwhile, some studies on tunable absorbers [16,17] and multiband absorbers [18][19][20] have been performed.…”

Section: Introductionmentioning

confidence: 99%

A Polarization-Dependent Frequency-Selective Metamaterial Absorber with Multiple Absorption Peaks

et al. 2017

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Abstract:A polarization-dependent, frequency-selective metamaterial (MM) absorber based on a single-layer patterned resonant structure intended for F frequency band is proposed. The design, fabrication, and measurement for the proposed absorber are presented. The absorber's absorption properties at resonant frequencies have unique characteristics of a single-band, dual-band, or triple-band absorption for different polarization of the incident wave. The calculated surface current distributions and power loss distribution provide further understanding of physical mechanism of resonance absorption. Moreover, a high absorption for a wide range of TE-polarized oblique incidence was achieved. Hence, the MM structure realized on a highly flexible polyimide film, makingthe absorber suitable for conformal geometry applications. The proposed absorber has great potential in the development of polarization detectors and polarizers.

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Broadband and polarization-insensitive terahertz absorber based on multilayer metamaterials

Cited by 99 publications

References 25 publications

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Skew symmetric structure for ultra-broadband electromagnetic absorbing

A Polarization-Dependent Frequency-Selective Metamaterial Absorber with Multiple Absorption Peaks

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