Development of frequency-tunable multiple-band terahertz absorber based on control of polarization angles

Cui, Zijian; Zhu, Dongying; Yue, Lisha; Hu, Hui; Chen, Suguo; Wang, Xinmei; Wang, Yue

doi:10.1364/oe.27.022190

Cited by 22 publications

(8 citation statements)

References 37 publications

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“…This feature results in a negative refractive index 3 . DNG property of metamaterial depends on its structure, which empowers it for different use like absorbers 4 , 5 , antennas, SAR (specific absorption ratio) 6 , filters 7 , waveguides 8 , invisible clocks 6 , mobile applications 9 , polarization converters 10 , lenses 11 , THz optical applications 12 – 14 and different types of sensor 5 , 15 – 17 . After the first successful ascertainment of metamaterial absorber (MMA) properties, numerous studies are ongoing to design MMA for several applications like GPS positioning application 18 , noise reduction by improving MIMO antenna isolation 19 , reduction of radar cross-section 20 , stealth technology for military use 21 , underwater sound absorption 22 , cryptography 23 , thermal and wavelength selectable microbolometers 24 , cancer cell detection or biosensing 16 , 25 , 26 , imaging 27 , 28 and detection for explosive materials 29 .…”

Section: Introductionmentioning

confidence: 99%

Polarization insensitive symmetrical structured double negative (DNG) metamaterial absorber for Ku-band sensing applications

Hakim

Alam

Soliman

et al. 2022

Sci Rep

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Metamaterial absorber (MMA) is now attracting significant interest due to its attractive applications, such as thermal detection, sound absorption, detection for explosive, military radar, wavelength detector, underwater sound absorption, and various sensor applications that are the vital part of the internet of things. This article proposes a modified square split ring resonator MMA for Ku-band sensing application, where the metamaterial structure is designed on FR-4 substrate material with a dielectric constant of 4.3 and loss tangent of 0.025. Perfect absorption is realized at 14.62 GHz and 16.30 GHz frequency bands, where peak absorption is about 99.99% for both frequency bands. The proposed structure shows 70% of the average absorption bandwidth of 420 MHz (14.42–14.84 GHz) and 480 MHz (16.06–16.54 GHz). The metamaterial property of the proposed structure is investigated for transverse electromagnetic mode (TEM) and achieved negative permittivity, permeability, and refractive index property for each absorption frequency band at 0°, 45°, and 90° polarization angles. Interference theory is also investigated to verify the absorption properties. Moreover, the permittivity sensor application is investigated to verify the sensor performance of the proposed structure. Finally, a comparison with recent works is performed, which shows that the proposed MMA can be a good candidate for Ku-band perfect absorber and sensing applications.

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Section: Introductionmentioning

confidence: 99%

Polarization insensitive symmetrical structured double negative (DNG) metamaterial absorber for Ku-band sensing applications

Hakim

Alam

Soliman

et al. 2022

Sci Rep

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show abstract

“…22 Chowdhary et al reported an ultra-broadband perfect metamaterial absorber consisting of a two-dimensional (2D) array of metal-dielectric multilayer structures in the shape of a semi-ellipsoid. 23 In the previous works, [24][25][26] polarization tunable multiband terahertz resonant absorbers were developed using anisotropic microstructure arrays. However, few previous works have paid attention to polarization-independent ultra-narrowband absorbers in the optical communication band.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, semiconductor and semiconductor oxide have a lower loss in the near-infrared range, which is more likely to achieve perfect absorption than metal. In this paper, different from traditional metal-insulator-metal sandwiched optical absorbers, 24,28 we proposed a dualnarrowband perfect absorber in the optical communication region, the Si nano-disk arrays are placed above the dielectric substrate with a gold film at the bottom of the structure, and the Si nano-disk arrays were embedded in polymethyl methacrylate (PMMA). The simulation results show that the designed absorber has two ultrahigh resonant peaks with absorption exceeding 99% at 1310 or 1550 nm.…”

Section: Introductionmentioning

confidence: 99%

Polarization‐independent dual narrow‐band perfect metamaterial absorber for optical communication

Xie

Sun

Wang

et al. 2022

Micro & Optical Tech Letters

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In this paper, we demonstrate a dual narrow‐band perfect metamaterial absorber for optical communication, where a silicon nano‐disk array is placed on a thin gold film separated by a dielectric layer. Numerical results reveal that dual narrow‐band perfect absorption peaks, which are attributed to waveguide mode and magnetic dipole resonance mode, are achieved at 1310 and 1550 nm, respectively. The results show that the absorption of the two peaks is higher than 99% under the normal incidence of both TE and TM polarizations and the bandwidth is 5 and 15 nm, respectively. Moreover, the absorption peak at 1310 nm can be independently tuned by varying the thickness of the dielectric layer. These findings imply that the proposed absorber can be used in the field of optical communication, frequency‐selective photodetection, and intersatellite laser communication.

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“…The emergence of the terahertz regime's high-tech technologies has developed microelectronics knowledge and low-dimensional devices, such as filters, detectors, and absorbers, in the different fields of applied science and the industry [1][2][3][4][5][6]. Among these, absorbers [7][8][9][10] have attracted particular attention due to their optical performance in a wide range of applications, including spectroscopy [11], biosensing [12,13], optical control [14,15], and solar cells [16][17][18]. In this context, using conductive structures with sub-wavelength dimensions has the potential to generate localized surface plasmon resonances (LSPR) on the absorption band, which are dependent on the opto-geometric characteristics and physical properties of their materials [19].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Terahertz Perfect Absorber with Tunable Absorption Characteristic Using Fractal-Shaped Graphene Layers

et al. 2021

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Graphene material, due to its unique conductivity and transparency properties, is utilized extensively in designing tunable terahertz perfect absorbers. This paper proposes a framework to design a tunable terahertz perfect absorber based on fractal triangle-shaped graphene layers embedded into dielectric substrates with the potential for spectral narrowing and widening of the absorption response without the need for geometric manipulation. In this way, the absorption cross-section spectra of the suggested configurations are achieved over the absorption band. First, the defection impact on the single-layer fractal triangle-shaped graphene structure inserted in insulators of the absorber is evaluated. Then, a flexible tunability of the absorbance’s peak is indicated by controlling the Fermi energy. By stacking fractal graphene sheets as a double graphene layer configuration in both the same and cross-states positioning, it is demonstrated that the absorption characteristics can be switched at 6–8 THz with a stronger amplitude, and 16–18 THz with a lower intensity. The impact of changing the Fermi potentials of embedded graphene layers is yielded, resulting in a plasmonic resonance shift and a significant broadening of the absorption bandwidth of up to five folds. Following, the absorption spectra related to the fractal triangle-shaped structures consist of a multi-stage architecture characterized by a spectral response experiencing a multiband absorbance rate and an absorption intensity of over 8 × 106 nm2 in a five-stage perfect absorber. Ultimately, the variations of the absorbance parameter and plasmonic mode under rotating the graphene sheet are explored for single and double fractal triangle-shaped perfect configurations on the absorption band. The presented mechanism demonstrates the tunability of the absorption spectrum in terms of narrowing or broadening and switching the plasmonic resonance by configuring multi-stage structures that can employ a broad range of applications for sensory devices.

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Development of frequency-tunable multiple-band terahertz absorber based on control of polarization angles

Cited by 22 publications

References 37 publications

Polarization insensitive symmetrical structured double negative (DNG) metamaterial absorber for Ku-band sensing applications

Polarization insensitive symmetrical structured double negative (DNG) metamaterial absorber for Ku-band sensing applications

Polarization‐independent dual narrow‐band perfect metamaterial absorber for optical communication

Design and Simulation of Terahertz Perfect Absorber with Tunable Absorption Characteristic Using Fractal-Shaped Graphene Layers

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