Novel quad-band terahertz metamaterial absorber based on single pattern U-shaped resonator

Wang, Ben‐Xin; Wang, Guizhen

doi:10.7567/apex.10.034301

Cited by 13 publications

(10 citation statements)

References 23 publications

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“…1) Since then, perfect light absorption has been widely studied owing to its wide application prospects. [2][3][4] By tuning the structural size and dielectric parameters, the absorption behavior can be manipulated in the frequency range from the microwave to the infrared and visible regions. 5,6) The perfect absorption mainly results from the plasmonic resonances in the triplelayer metal resonator-insulator film-metal reflector structure.…”

mentioning

confidence: 99%

III–V semiconductor resonators: A new strategy for broadband light perfect absorbers

Liu¹,

Chen²,

Liu³

et al. 2017

Appl. Phys. Express

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Broadband light perfect absorbers (BPAs) are desirable for applications in numerous optoelectronics devices. In this work, a semiconductor-based broadband light perfect absorber (S-BPA) has been numerically demonstrated by utilizing plasmonlike resonances of high-index semiconductor resonators. A maximal absorption of 99.7% is observed in the near-infrared region. By taking the absorption above 80% into account, the spectral bandwidth reaches 340 nm. The absorption properties mainly originate from the optical cavity modes induced by the cylinder resonators and ultrathin semiconductor film. These optical properties and simple structural features can maintain the absorber platform with wide applications in semiconductor optoelectronics.

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mentioning

confidence: 99%

III–V semiconductor resonators: A new strategy for broadband light perfect absorbers

Liu¹,

Chen²,

Liu³

et al. 2017

Appl. Phys. Express

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“…Absorbers can be used in applications of medical treatment, electromagnetic (EM) compatibility, antenna pattern shaping, target stealth, etc. [1][2][3][4][5][6] Many efforts in the previous investigation about the absorber mainly concentrate on reducing its thickness, simplifying its configuration, and so on. [7] In most practical applications, there is an urgent need to develop an absorber responding to the EM wave with an adequately wide frequency band.…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband and polarization-independent planar absorber based on multilayered graphene

Wang¹,

Gao²,

Jiang

et al. 2017

Chinese Phys. B

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We propose an ultra-broadband and polarization independent planar absorber comprising multilayered graphene. The bandwidth of the proposed absorber is extended by increasing the number of layers of graphene, and it is polarization independent due to its symmetrical unit structure. The full wave simulation results show that an absorber with three graphenebased layers can efficiently harvest an electromagnetic wave with random polarization from 17.9 GHz to 188.7 GHz (i.e., covering frequency regimes from K to D bands and relative bandwidth of ∼ 165%). The physical absorption mechanism of ultra-broadband absorption has been elaborated upon using the destructive interference method and multiple resonances approach in a multilayered medium. The proposed absorber can be used in many applications such as medical treatment, electromagnetic compatibility, and stealth technique.

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“…25,26) The other category is to excite fundamental resonance and high-order resonances simultaneously. 3,[27][28][29] However, these pioneering studies have been limited in high order multipoles excitation, i.e., quadrupoles and octupoles, which are difficult to excite at high frequency regimes, such as infrared and visible wavelengths. 30) A common disadvantage for both design strategies is that most of them are based on structures in a metal/insulator/metal (MIM) configuration: the top layer is a patterned metallic structure, which is separated from the bottom metallic mirror by a dielectric interlayer.…”

mentioning

confidence: 99%

Polarization-controlled triple-band absorption in all-metal nanostructures with magnetic dipoles and anapole responses

Liang

Zhang

Huang

et al. 2019

Appl. Phys. Express

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An all-metal absorber consisting of an L-shaped stripe with two vertical pillars is constructed and investigated for triple-band absorption. The nanostructure reveals distinct absorption properties at resonant wavelengths selected by the polarization of incident waves. It achieves single-band absorptivity of 98.5% at 5.198 μm for 135° linearly polarized wave and dual-band absorptivity of 91.5% and 99.4% at 3.058 μm and 3.887 μm respectively for 45° linear polarization. We interpret the physical mechanism by using the charge-current multipolar expansion framework, which shows that the excitation of two transverse magnetic dipoles and a non-radiating anapole are responsible for these absorption resonances.

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Novel quad-band terahertz metamaterial absorber based on single pattern U-shaped resonator

Cited by 13 publications

References 23 publications

III–V semiconductor resonators: A new strategy for broadband light perfect absorbers

III–V semiconductor resonators: A new strategy for broadband light perfect absorbers

Ultra-broadband and polarization-independent planar absorber based on multilayered graphene

Polarization-controlled triple-band absorption in all-metal nanostructures with magnetic dipoles and anapole responses

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