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Advanced Materials for Plasmonics, Metamaterials and Metasurfaces

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 March 2023) | Viewed by 13063

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Special Issue Editors

Dr. Xiaojun Huang

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Guest Editor

College of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
Interests: metamaterials for microwave and RF applications; EMC for coal mines

Dr. Yu Luo

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Guest Editor

School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore City, Singapore
Interests: plasmonics and metamaterials for microwave and optical applications

Prof. Dr. Helin Yang

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Guest Editor

College of Physical Science and Technology, Huazhong Normal University, Wuhan, China
Interests: metamaterials; metadevices

Special Issue Information

Dear colleagues,

Metamaterials typically refer to artificial three-dimensional (3D), volumetric media composed of bulk metallic and/or dielectric constituent elements, which exhibit electromagnetic responses that are not found in nature and are radically different from those of their constituent materials. As two-dimensional embodiments of metamaterials, metasurfaces are planar devices composed of spatially varying subwavelength elements that could be designed to control the phase, amplitude, wavelength, and polarization of waves solely via engineering the geometry. Compared to traditional devices, the light weight, low loss, and integrable and conformable design make metasurfaces very attractive. Plasmonic metamaterials promise a far-reaching scientific and industrial impact. To date, they have enabled remarkable advances in the fields of optical imaging, molecular sensing, catalysis, manufacturing, data storage, medical therapy, and energy conversion. This Special Issue seeks to provide a current snapshot of recent advances, as well as highlight ongoing challenges in plasmonics, metamaterials, and metasurfaces, through collecting expert views and article contributions across a broad spectrum, including on the simulation, fabrication, experiment, and application of plasmonics, metamaterials, and metasurfaces.

It is my great pleasure to invite you to submit a manuscript to the Special Issue. Full papers, communications, and reviews are all welcomed.

Dr. Xiaojun Huang
Dr. Yu Luo
Prof. Dr. Helin Yang
Guest Editors

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Keywords

plasmonics
metamaterials
metasurfaces

Published Papers (7 papers)

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Research

11 pages, 6700 KiB

Open AccessArticle

Design of a Frequency Selective Rasorber Based on a Band-Patterned Octagonal Ring

by Xiaojun Huang, Yutao Ma, Xiaoyan Li, Linyan Guo and Helin Yang

Materials 2023, 16(5), 1960; https://doi.org/10.3390/ma16051960 - 27 Feb 2023

Cited by 1 | Viewed by 1522

Abstract

In this study, a dual-polarization and low-profile frequency-selective rasorber (FSR) constructed from a novel band-patterned octagonal ring and dipole slot-type elements is investigated. We show the process of designing from a full octagonal ring to realize a lossy frequency selective surface of our proposed FSR, and it has a passband with low insertion loss between the two absorptive bands. An equivalent circuit for our designed FSR is modeled to explain the introduction of the parallel resonance. Surface current, electric energy, and magnetic energy of the FSR are further investigated to illustrate the working mechanism. Simulated results indicate that S₁₁ < −10 dB bandwidth within 5.2–14.8 GHz, S₂₁ > −3 dB passband within 9.62–11.72 GHz, lower absorptive bandwidth within 5.02–8.80 GHz, and upper absorptive bandwidth within 12.94–14.89 GHz are obtained under normal incidence. Meanwhile, our proposed FSR possesses the properties of dual-polarization and angular stability. To verify the simulated results, a sample with thickness of 0.097 λ_L is manufactured, and the results are experimentally verified. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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9 pages, 2758 KiB

Open AccessArticle

An Active Electromagnetically Induced Transparency (EIT) Metamaterial Based on Conductive Coupling

by Wu Zhang, Jiahan Lin, Xiaohui Fang, Yanxiao Lin, Kai Wang and Meng Zhang

Materials 2022, 15(20), 7371; https://doi.org/10.3390/ma15207371 - 21 Oct 2022

Cited by 5 | Viewed by 1707

Abstract

In this paper, we demonstrate an active metamaterial manifesting electromagnetically induced transparency (EIT) effect in the microwave regime. The metamaterial unit cell consists of a double-cross structure, between which a varactor diode is integrated. The capacitance of the diode is controlled by a reversed electrical bias voltage supplied through two connected strip lines. The diode behaves as a radiative resonant mode and the strip lines as a non-radiative resonant mode. The two modes destructively interference with each other through conductive coupling, which leads to a transmission peak in EIT effect. Through electrical control of the diode capacitance, the transmission peak frequency is shifted from 7.4 GHz to 8.7 GHz, and the peak-to-dip ratio is tuned from 1.02 to 1.66, demonstrating a significant tunability. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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13 pages, 20714 KiB

Open AccessArticle

Mutual Coupling Suppression of GPR Antennas by Depositing Wideband Meta-Absorber with Resistive Film

by Yajun Zhou, Minjie Guo, Linyan Guo, Yi Zhou and Changxin Wei

Materials 2022, 15(20), 7137; https://doi.org/10.3390/ma15207137 - 13 Oct 2022

Viewed by 1332

Abstract

The direct wave between the transceiver antenna negatively affects the dynamic range and imaging quality of ground penetrating radar (GPR). Suppressing this direct wave is a vital problem in enhancing the performance of the whole GPR system. In this paper, a Minkowski-fractal metamaterial absorber (MMA) with the resistive film is proposed in the GPR transceiver antenna to reduce the mutual coupling. The simulated and measured results indicate that this MMA has an effective wideband absorption in 1.0-8.0 GHz. And the thickness of MMA is only 0.007

λ_{0}

(with respect to 2.0 GHz). This wideband MMA can reduce the mutual coupling of the proposed GPR transceiver antenna by an average of 10 dB. And it also mitigates the time-domain ringing problem of the transmit antenna. Real-world experiments demonstrate that the direct wave from the transmitting antenna can be reduced and the target echo arriving at the receiving antenna can be increased if this MMA is placed in the proposed transceiver antenna. This resistive film-based MMA offers great promise in realizing low-cost, compact, and lightweight GPR antennas, which can also be extended to high-frequency microwave imaging. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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11 pages, 2410 KiB

Open AccessArticle

Design of All-Dielectric Metasurface-Based Subtractive Color Filter by Artificial Neural Network

by Jinhao Wang, Zichun Lin, Ye Fan, Luyao Mei, Wenqiang Deng, Jinwen Lv and Zhengji Xu

Materials 2022, 15(19), 7008; https://doi.org/10.3390/ma15197008 - 9 Oct 2022

Cited by 4 | Viewed by 1812

Abstract

Structural colors produced by light manipulating at subwavelength dimensions have been widely studied. In this work, a metasurface-based subtractive color filter (SCF) is demonstrated. The color display of the SCF is confirmed by finding the complementary color of colors filtered by SCF within the color wheel. In addition, two artificial neural network (ANN) models are utilized to accelerate the metasurface forward prediction, and the long short-term memory (LSTM) shows much better performance than traditional multilayer perceptron (MLP). Meanwhile, we train an inverse ANN model established with LSTM to recover the optimal geometric parameter combinations of the meta-atoms. With the variation of the geometric parameters of meta-atoms, versatile color displays of structural colors are realized. The metasurface we propose exhibits good performance of transmissive-type structural color in visible range. The work provides a method for high-efficiency geometric parameter prediction, and paves the way to nanostructure-based color design for display and anticounterfeiting applications. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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10 pages, 4258 KiB

Open AccessArticle

Ultra-Broadband Mid-Infrared Metamaterial Absorber Based on Multi-Sized Resonators

by Xiaojun Huang, Ziliang Zhou, Miao Cao, Rong Li, Cuizhen Sun and Xiaoyan Li

Materials 2022, 15(15), 5411; https://doi.org/10.3390/ma15155411 - 5 Aug 2022

Cited by 11 | Viewed by 1757

Abstract

Mid-infrared metamaterial absorbers have many applications in the field of infrared detection, infrared thermal energy utilization, radiation refrigeration, invisible camouflage, etc. In this study, we designed an ultra-broadband mid-infrared metamaterial absorber based on multi-sized resonators. The structure of the absorber consisted of a gold substrate and nine resonators. The simulated results showed that the absorptivity of the absorber was higher than 90% in the 8.33–15.09 μm waveband with an average absorptivity of 95.17%. The energy distributions of the electric and magnetic fields were introduced to investigate the physics of broadband absorption. Moreover, we combined the multi-layer structure with the plane random arrangement structure to achieve a balance between thickness and width. Our study further illustrates the potential application of multi-sized resonators in metamaterial absorbers to realize high absorptivity and ultra-broadband to improve the performance of devices applied in infrared detection, radiation refrigeration, and other fields. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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11 pages, 4191 KiB

Open AccessArticle

Analyzing the Mechanism of Zinc Oxide Nanowires Bending and Bundling Induced by Electron Beam under Scanning Electron Microscope Using Numerical and Simulation Analysis

by Basma ElZein, Ali Elrashidi, Elhadj Dogheche and Ghassan Jabbour

Materials 2022, 15(15), 5358; https://doi.org/10.3390/ma15155358 - 3 Aug 2022

Cited by 3 | Viewed by 2031

Abstract

The bending effect of self-catalyst zinc oxide nanowires on a photoconducting behavior has been investigated by in-situ scanning electron microscope method and interpreted by analytical modeling. Zinc oxide NWs tend to incline due to geometric instability and because of the piezoelectric properties, which was confirmed by scanning electron microscope images. A cantilever bending model adequately describes the bending and bundling events, which are linked to the electrostatic interaction between nanowires. The light absorption of zinc oxide nanowires in the visible and near infrared bands has been modelled using the finite difference time domain method. The influence of the density of nanowires (25%, 50%, 75%) and the integration of plasmonic nanoparticles distributed on the seed layer (with varied radii) on the light absorption of zinc oxide nanowires was studied using simulation analysis. We have shown that the geometry of zinc oxide nanowires in terms of length, separation distance, and surface charge density affects the process of zinc oxide nanowires bending and bundling and that absorption will be maximized by integrating Au plasmonic nanoparticles with a radius of 10 nm. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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8 pages, 3508 KiB

Open AccessArticle

Control of Polarization Orientation Angle of Scattered Light Based on Metasurfaces: −90° to +90° Linear Variation

by Song Wu

Materials 2022, 15(6), 2076; https://doi.org/10.3390/ma15062076 - 11 Mar 2022

Cited by 8 | Viewed by 1924

Abstract

Metasurfaces can be used to precisely control polarization state of the scattered light. Here, we present a metasurface-based terahertz device. On the one hand, it serves as a high performance linear polarization converter in transmission of over 80% power with weak reflection. It is capable of rotating linear polarization orientation angle with respect to x-axis continuously from −90° to +90° at 0.84 THz. On the other hand, it serves as a circular polarizer. It can transform a linear polarized wave into a circular polarized wave at 2.49 THz. The transmitted and reflected field are both circular polarized with 50% power. The proposed device with dual functionalities can be applied to modulate the polarization state of the signal in THz wireless communication. Full article

(This article belongs to the Special Issue Advanced Materials for Plasmonics, Metamaterials and Metasurfaces)

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