Multi-band terahertz superabsorbers based on perforated square-patch metamaterials

Wang, Ben‐Xin; He, Yongfeng; Lou, Pengcheng; Zhu, Huaxin

doi:10.1039/d0na00903b

Cited by 77 publications

(24 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the airborne field, a variety of sound absorption structures such as Helmholtz resonators (Li et al, 2018;Huang et al, 2019) and Fabry-Pérot resonators (Long et al, 2019;Kumar and Lee, 2020;Liu et al, 2020), have shown the capability of perfect and broadband absorption. The emergence of acoustic metamaterials shows a new method for broadband sound absorption (Wang et al, 2019(Wang et al, , 2020(Wang et al, , 2021. Many other metamaterials broadband low-frequency absorbers have been proposed and researched (Mei et al, 2012;Yang et al, 2017;Huang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A Composite Perforated Partitioned Sandwich Panel With Corrugation for Underwater Low-Frequency Sound Absorption

Wang

Chen

2021

Front. Mech. Eng.

View full text Add to dashboard Cite

Underwater acoustic wave absorption and control play an important role in underwater applications. Various types of underwater acoustic metamaterials have been proposed in recent years with the vigorous development of acoustic metamaterials. Compared with airborne sound, underwater sound waves have a longer wavelength and much smaller propagation loss, making them more difficult to control. In addition, given that the acoustic impedance of water is much greater than that of air, numerous conventional materials and structures are not suited to underwater use. In this paper, we propose a composite structure based on an excellent broadband low-frequency sound absorber of air using aluminum mixed with rubber. Our composite structure possesses broadband low-frequency (<1,000 Hz) sound absorption underwater, omnidirectional high sound absorption coefficient under the oblique incidence (0–75°), and pressure resistance. It has promising applications for underwater acoustic wave control and contributes to the design of underwater acoustic metamaterials.

show abstract

Section: Introductionmentioning

confidence: 99%

A Composite Perforated Partitioned Sandwich Panel With Corrugation for Underwater Low-Frequency Sound Absorption

Wang

Chen

2021

Front. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…B. Pendry and Professor D. R. Smith verified negative index refraction metamaterials through theory and experiments using split-ring resonators (SRRs) in 2000, [16,17] MAs have been widely investigated in the EM absorption field. [18,19] Ran and co-workers designed a left-handed metamaterial in the shape of "Ω" and obtained negative permittivity and negative permeability in 2004. [20] Yang used eight lumped resistors inserted in double-square loops in 2007, which resulted in two resonant frequencies, and found that the radar cross section (RCS) reached À10dBsm at 2-8 GHz and 8-18 GHz.…”

Section: Introductionmentioning

confidence: 99%

Lossy Frequency‐Selective Surface Metamaterials Based on Silicon Slice with Broadband Microwave Absorption at Elevated Temperature

Qiao

Liao

et al. 2022

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

A broadband metamaterial absorber (MA) with high‐temperature resistance is designed and fabricated using a regular octagonal ring‐cross structure as a frequency‐selective surface (FSS). A high‐temperature conductive paste and SiO2 are used as the FSS raw materials and middle layer, respectively. Simulation and experimental results show that the absorber reaches a reflection loss below −5 dB at the 5.17–18 GHz range with normal incidence at room temperature. The measured values are in good agreement with the simulation results. At 800 °C, the absorption bandwidth expands to 13.3 GHz (4.72–18 GHz). The equivalent impedance of the absorber is obtained using an inversion method to qualitatively explain its working mechanism. The electric energy density, magnetic energy density, and surface current at the resonance frequency provide an intuitive understanding of the power loss of the structure. Comprehensive analysis illustrates that the main absorption mechanisms of the high‐temperature broadband MA (HBMA) are ohmic and resonance losses.

show abstract

“…Having a low-power atomistic-scale mechanism to control electric-field rotation and absorption of EM waves is a desirable capability for modern integrated and compact optical nanodevices, sensors and detectors 31,32 . Control of the polarization, phase, and magnitude of reflected and transmitted EM waves has been explored using metamaterials [33][34][35][36][37][38][39][40][41][42][43] (Color online). The representative setup for revealing handedness-switching predicted in this paper.…”

Section: Introductionmentioning

confidence: 99%

Controllable nonreciprocal optical response and handedness-switching in magnetized spin orbit coupled graphene

Alidoust,

Halterman

2022

Preprint

View full text Add to dashboard Cite

Starting from a low-energy effective Hamiltonian model, we theoretically calculate the dynamical optical conductivity and permittivity tensor of a magnetized graphene layer with Rashba spin orbit coupling (SOC). Our results reveal a transverse Hall conductivity correlated with the usual nonreciprocal longitudinal conductivity. Further analysis illustrates that for intermediate magnetization strengths, the relative magnitudes of the magnetization and SOC can be identified experimentally by two well-separated peaks in the dynamical optical response (both the longitudinal and transverse components) as a function of photon frequency. Moreover, the frequency dependent permittivity tensor is obtained for a wide range of chemical potentials and magnetization strengths. Employing experimentally realistic parameter values, we calculate the circular dichroism of a representative device consisting of magnetized spin orbit coupled graphene and a dielectric insulator layer, backed by a metallic plate. The results reveal that this device has different relative absorptivities for right-handed and left-handed circularly polarized electromagnetic waves. It is found that the magnetized spin orbit coupled graphene supports strong handedness-switchings, effectively controlled by varying the chemical potential and magnetization strength with respect to the SOC strength.

show abstract

Multi-band terahertz superabsorbers based on perforated square-patch metamaterials

Abstract: This paper presents a kind of multi-band terahertz superabsorber, its surface structure consists of a square metallic patch with a very small rectangular hole whose area is only 3.94% of...

Cited by 77 publications

References 50 publications

A Composite Perforated Partitioned Sandwich Panel With Corrugation for Underwater Low-Frequency Sound Absorption

A Composite Perforated Partitioned Sandwich Panel With Corrugation for Underwater Low-Frequency Sound Absorption

Lossy Frequency‐Selective Surface Metamaterials Based on Silicon Slice with Broadband Microwave Absorption at Elevated Temperature

Controllable nonreciprocal optical response and handedness-switching in magnetized spin orbit coupled graphene

Contact Info

Product

Resources

About