Dual-Band Perfect Absorber Based on All-Dielectric GaAs Metasurface for Terahertz Wave

Weng, Xiaodi; Wang, Jie; Xu, Changming; Wang, Yongqing; Liao, Yining; Wang, Xuejin

doi:10.1007/s11468-022-01783-9

Cited by 6 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metasurfaces have excellent electromagnetic properties beyond the limitation of natural materials [2], which showing a variety of flexible control of parameters such as amplitude [3], phase [4,5], polarization [6], etc. Therefore, due to the application in the spectrum range from terahertz to visible light [7], such as filters [8,9], biosensors [10][11][12][13], perfect absorbing materials [14,15] * Author to whom any correspondence should be addressed. and optical switches [16,17], metasurfaces have aroused great research interest.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Chen,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

In this paper, a tunable metasurface filter based on electrochemical metallization is proposed. The finite element method (FEM) is used to simulate the formation and rupture of the conductive filament (CF). The geometric structure of the metasurfaces filter is reconstructed by CF to achieve the purpose of tuning the transmission characteristics of the metasurface. Due to the formation of CF in the gap of separated rectangular gold patches, the proposed metasurface simultaneously exhibits the resonance characteristics of two separated rectangular gold patches and unseparated rectangular gold patches. Numerical calculations show that when the radius of the CF increases from 5 nm to 25 nm, the metasurface shows good tunable filtering characteristics, and its quality factor gradually increases. Finally, in order to solve the problem of consuming a lot of time to design metasurface, a deep neural network (DNN) is used to predict the transmission curves corresponding to different metasurface structures. The results show that the Mean Square Error (MSE) of the training model is less than 1×10-3, which shows superior robustness and generalization, and greatly shortens the time required for design. This design paves a new way to develop optoelectronic devices, such as modulators, sensors and optical switches.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Chen,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Among several features, absorption is one of the distinctive characteristics of the THz wave when interacting with artificial structures, and therefore it shows its suitability for metamaterial-based devices [6][7][8][9]. For instance, several reported studies related to THz metamaterial-based absorbers have been presented [10][11][12][13][14][15][16][17][18][19]. For instance, a few studies [10][11][12][13] include a simple metal structure and show significant absorption within the THz band.…”

Section: Introductionmentioning

confidence: 99%

Polarization-Insensitive, Wideband Terahertz Absorber Comprised of Fan-like Metasurface

et al. 2023

View full text Add to dashboard Cite

In this manuscript, we studied a wideband metasurface-based terahertz (THz) absorber. The metasurface of the proposed absorber was comprised of fan-like periodic resonators made of nickel (Ni). The absorptivity of the proposed absorber was analyzed from 3.5 to 5 THz. The wideband absorptivity is observed with an absorption above 75% from 3.7 to 4.7 THz. The polarization-insensitive behavior of the absorber is depicted due to the symmetric nature of the top metasurface. The absorption feature was also analyzed for the transverse electric (TE) and transverse magnetic (TM) operating modes for the obliquity of the incidence wave. The surface current density shows that absorption is achieved due to the electric resonance of the proposed absorber. The proposed absorber would be useful for several applied areas covering medical science, communication, safety supervision, chemical sensing, and imaging.

show abstract

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Wang,

Qin,

Duan

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior of electromagnetic waves, providing sufficient possibility for the realization of metamaterial absorbers with outstanding performance. However, metamaterial absorbers composed of metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, and expensive preparation costs. The selection of dielectric materials provides excellent alternatives due to their remarkable properties, thus dielectric‐based metamaterial absorbers (DBMAs) have attracted much attention. To promote breakthroughs in DBMAs and guide their future development, this work systematically and deeply reviews the recent research progress of DBMAs from four different but progressive aspects, including physical principles; classifications, material selections and tunable properties; preparation technologies; and functional applications. Five different types of theories and related physical mechanisms, such as Mie resonance, guided‐mode resonance, and Anapole resonance, are briefly outlined to explain DBMAs having near‐perfect absorption performance. Mainstream material selections, structure designs, and different types of tunable DBMAs are highlighted. Several widely utilized preparation methods for customizing DBMAs are given. Various practical applications of DBMAs in sensing, stealth technology, solar energy absorption, and electromagnetic interference suppression are reviewed. Finally, some key challenges and feasible solutions for DBMAs’ future development are provided.

show abstract

Dual-Band Perfect Absorber Based on All-Dielectric GaAs Metasurface for Terahertz Wave

Cited by 6 publications

References 52 publications

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Polarization-Insensitive, Wideband Terahertz Absorber Comprised of Fan-like Metasurface

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Contact Info

Product

Resources

About