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Nanomaterials
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Advances in Photonic Metasurfaces and Metastructures
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Advances in Photonic Metasurfaces and Metastructures

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: closed (10 August 2024) | Viewed by 9457

Special Issue Editor

Dr. Viktoriia Babicheva

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM 87106-4343, USA
Interests: nanophotonics; nano-optics; photonic materials; electromagnetics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Novel methodologies in metastructures and plasmonics hold great potential for the generation, manipulation, sensing, and detection of signals at the nanometer scale, presenting significant prospects across a wide range of research directions in photovoltaics, optical communications, quantum information technology, biophotonics, lighting, sensing, chemistry, and medicine. Nonetheless, primary impediments hindering fundamental advancements and the broad practical utilization of these technologies originate from intrinsic material losses in constituent plasmonic components, the absence of materials with the required optical characteristics (e.g., exceedingly high refractive index, strong anisotropy, strong and fast response to external stimuli), and challenges associated with the reproducible and cost-effective realization of nanostructures. The recent discovery of innovative materials, including those with high refractive indices, plasmonic functionality, two-dimensional and layered materials, as well as materials exhibiting low losses, tunability, and compatibility with complementary metal-oxide-semiconductor (CMOS) technology, holds the potential to bring groundbreaking transformations to the field of nanophotonics, metasurfaces, and their diverse applications.

This Special Issue aims to highlight recent advances in the areas of metastructures and plasmonics with particular emphasis on metasurfaces, subwavelength light localization, quasi-bound states and high-quality factor resonances, multipolar and resonant responses in nanostructures, and related topics. Special attention is given to research directions related to engineering scattering, topological nanophotonics and parity–time symmetry, novel nanofabrication techniques for improving material properties, and enhanced nonlinear and dynamic responses in the metastructures.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Mie resonances and multipole excitations;
  • Bound and quasi-bound states in the continuum;
  • Two-dimensional and layered materials;
  • Plasmonic materials and metastructures based on them;
  • Directional scattering, multipole coupling, and Kerker effect;
  • Collective effects in metastructures;
  • Applications of metasurfaces and plasmonics.

We look forward to receiving your contributions.

Dr. Viktoriia Babicheva
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • mie resonances
  • collective effects
  • multipole decomposition
  • high-refractive-index materials
  • two-dimensional materials
  • Van der Waals materials
  • bound states in the continuum
  • epsilon-near-zero materials
  • Kerker effect
  • silicon
  • hyperbolic dispersion
  • plasmonic nanostructures
  • plasmonic sensors
  • plasmon-induced energy transfer

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Published Papers (6 papers)

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Research

16 pages, 3158 KiB  
Article
Resonant Metasurfaces with Van Der Waals Hyperbolic Nanoantennas and Extreme Light Confinement
by Viktoriia E. Babicheva
Nanomaterials 2024, 14(18), 1539; https://doi.org/10.3390/nano14181539 - 23 Sep 2024
Viewed by 840
Abstract
This work reports on a metasurface based on optical nanoantennas made of van der Waals material hexagonal boron nitride. The optical nanoantenna made of hyperbolic material was shown to support strong localized resonant modes stemming from the propagating high-k waves in the hyperbolic [...] Read more.
This work reports on a metasurface based on optical nanoantennas made of van der Waals material hexagonal boron nitride. The optical nanoantenna made of hyperbolic material was shown to support strong localized resonant modes stemming from the propagating high-k waves in the hyperbolic material. An analytical approach was used to determine the mode profile and type of cuboid nanoantenna resonances. An electric quadrupolar mode was demonstrated to be associated with a resonant magnetic response of the nanoantenna, which resembles the induction of resonant magnetic modes in high-refractive-index nanoantennas. The analytical model accurately predicts the modes of cuboid nanoantennas due to the strong boundary reflections of the high-k waves, a capability that does not extend to plasmonic or high-refractive-index nanoantennas, where the imperfect reflection and leakage of the mode from the cavity complicate the analysis. In the reported metasurface, excitations of the multipolar resonant modes are accompanied by directional scattering and a decrease in the metasurface reflectance to zero, which is manifested as the resonant Kerker effect. Van der Waals nanoantennas are envisioned to support localized resonances and can become an important functional element of metasurfaces and transdimensional photonic components. By designing efficient subwavelength scatterers with high-quality-factor resonances, this work demonstrates that this type of nanoantenna made of naturally occurring hyperbolic material is a viable substitute for plasmonic and all-dielectric nanoantennas in developing ultra-compact photonic components. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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10 pages, 17332 KiB  
Article
A Flexible and Optical Transparent Metasurface Absorber with Broadband RCS Reduction Characteristics
by Babar Hayat, Jinling Zhang, Adil Khan, Syed Muzahir Abbas, Abdul Majeed and Samir Salem Al-Bawri
Nanomaterials 2024, 14(18), 1507; https://doi.org/10.3390/nano14181507 - 17 Sep 2024
Cited by 1 | Viewed by 962
Abstract
Metasurface absorbers (MSAs) are of significant importance in a wide range of applications, such as in the field of stealth technology. Nevertheless, conventional designs demonstrate limited flexible characteristics and a lack of transparency, hence constraining their suitability for certain radar stealth applications. This [...] Read more.
Metasurface absorbers (MSAs) are of significant importance in a wide range of applications, such as in the field of stealth technology. Nevertheless, conventional designs demonstrate limited flexible characteristics and a lack of transparency, hence constraining their suitability for certain radar stealth applications. This study introduces a novel MSA operating in the broad microwave range, which exhibits both optical transparency and flexibility. The structure consists of a flexible substrate made of polyvinyl chloride (PVC), along with a resistive film composed of indium tin oxide (ITO). The proposed structure exhibits the ability to effectively absorb over 90% of the energy carried by incident electromagnetic (EM) waves across the frequency range of 9.85–41.76 GHz within an angular range of 0° to 60°. In addition, to assess the efficacy of the absorption performance, an examination of the radar cross-section (RCS) characteristics is conducted. The results indicate a reduction of over 10 dB across the aforementioned broad frequency spectrum, regardless of the central angle. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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14 pages, 4047 KiB  
Article
Bi-Directional Full-Color Generation and Tri-Channel Information Encoding Based on a Plasmonic Metasurface
by Dewang Huo and Guoqiang Li
Nanomaterials 2024, 14(13), 1160; https://doi.org/10.3390/nano14131160 - 7 Jul 2024
Viewed by 3273
Abstract
Dynamic optical structural color is always desired in various display applications and usually involves active materials. Full-color generation, especially bi-directional full-color generation in both reflective and transmissive modes, without any active materials included, has rarely been investigated. Herein, we demonstrate a scheme of [...] Read more.
Dynamic optical structural color is always desired in various display applications and usually involves active materials. Full-color generation, especially bi-directional full-color generation in both reflective and transmissive modes, without any active materials included, has rarely been investigated. Herein, we demonstrate a scheme of bi-directional full-color generation based on a plasmonic metasurface modulated by the rotation of the polarization angle of the incident light without varying the geometry and the optical properties of the materials and the environment where the metasurface resides. The metasurface unit cell consists of plasmonic modules aligning in three directions and is patterned in a square array. The metasurface structural color device is numerically confirmed to generate full colors in both reflection and transmission. Based on the proposed polarization-dependent structural color, the information encoding process is demonstrated for three multiplexed animal images and quick-responsive (QR) codes to verify the efficient information encoding and decoding of the proposed scheme. In the simulation, the animals can be seen under different polarization incidences, and the QR codes can be successfully decoded by the polarization rotation in transmission. The proposed bi-directional full-color generation metasurface has great potential in applications such as kaleidoscope generation, anti-counterfeiting, dynamic color display, and optical information encoding. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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14 pages, 12117 KiB  
Article
Terahertz VO2-Based Dynamic Coding Metasurface for Dual-Polarized, Dual-Band, and Wide-Angle RCS Reduction
by Ling Wang, Feng Gao, Shuhua Teng, Tiantian Guo, Chenggao Luo and Yang Zeng
Nanomaterials 2024, 14(11), 914; https://doi.org/10.3390/nano14110914 - 23 May 2024
Viewed by 948
Abstract
With the rapid development of terahertz radar technology, the electromagnetic device for terahertz radar cross-section (RCS) reduction is worth investigating. However, the existing research concentrates on the RCS reduction metasurface with fixed performance working in the microwave band. This paper proposes a terahertz [...] Read more.
With the rapid development of terahertz radar technology, the electromagnetic device for terahertz radar cross-section (RCS) reduction is worth investigating. However, the existing research concentrates on the RCS reduction metasurface with fixed performance working in the microwave band. This paper proposes a terahertz dynamic coding metasurface integrated with vanadium dioxide (VO2) for dual-polarized, dual-band, and wide-angle RCS reduction. The simulation result indicates that by switching the state of the VO2 between insulator and metal, the metasurface can realize the effective RCS reduction at 0.18 THz to 0.24 THz and 0.21 THz to 0.39 THz under the left-handed and right-handed circularly polarized incident waves. When the polar and azimuth angles of the incident wave vary from 0° to 40° and 0° to 360° respectively, this metasurface can maintain a 10 dB RCS reduction. This work has potential value in the terahertz stealth field. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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11 pages, 5447 KiB  
Article
Quarter-Wave Plate Metasurfaces for Generating Multi-Channel Vortex Beams
by Ziheng Zhang, Manna Gu, Guosen Cui, Yuxiang Zhou, Teng Ma, Kaixin Zhao, Yunxiao Li, Chunxiang Liu, Chuanfu Cheng and Li Ma
Nanomaterials 2024, 14(4), 374; https://doi.org/10.3390/nano14040374 - 17 Feb 2024
Cited by 1 | Viewed by 1366
Abstract
Metasurfaces of quarter-wave plate (QWP) meta-atoms have exhibited high flexibility and versatile functionalities in the manipulation of light fields. However, the generation of multi-channel vortex beams with the QWP meta-atom metasurfaces presents a significant challenge. In this study, we propose dielectric metasurfaces composed [...] Read more.
Metasurfaces of quarter-wave plate (QWP) meta-atoms have exhibited high flexibility and versatile functionalities in the manipulation of light fields. However, the generation of multi-channel vortex beams with the QWP meta-atom metasurfaces presents a significant challenge. In this study, we propose dielectric metasurfaces composed of QWP meta-atoms to manipulate multi-channel vortex beams. QWP meta-atoms, systematically arranged in concentric circular rings, are designed to introduce the modulations via the propagation phase and geometric phase, leading to the generation of co- and cross-polarized vortex beams in distinct channels. Theoretical investigations and simulations are employed to analyze the modulation process, confirming the capability of QWP meta-atom metasurfaces for generating the multi-channel vortex beams. This study presents prospective advancements for the compact, integrated, and multifunctional nanophotonic platforms, which have potential applications in classical physics and quantum domains. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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14 pages, 4239 KiB  
Article
A Mid-Infrared Multifunctional Optical Device Based on Fiber Integrated Metasurfaces
by Weikang Yao, Qilin Zhou, Chonglu Jing and Ai Zhou
Nanomaterials 2023, 13(17), 2440; https://doi.org/10.3390/nano13172440 - 28 Aug 2023
Cited by 1 | Viewed by 1469
Abstract
A metasurface is a two-dimensional structure with a subwavelength thickness that can be used to control electromagnetic waves. The integration of optical fibers and metasurfaces has received much attention in recent years. This integrated device has high flexibility and versatility. We propose an [...] Read more.
A metasurface is a two-dimensional structure with a subwavelength thickness that can be used to control electromagnetic waves. The integration of optical fibers and metasurfaces has received much attention in recent years. This integrated device has high flexibility and versatility. We propose an optical device based on fiber-integrated metasurfaces in the mid-infrared, which uses a hollow core anti-resonant fiber (HC-ARF) to confine light transmission in an air core. The integrated bilayer metasurfaces at the fiber end face can achieve transmissive modulation of the optical field emitted from the HC-ARF, and the Fano resonance excited by the metasurface can also be used to achieve refractive index (RI) sensing with high sensitivity and high figure of merit (FOM) in the mid-infrared band. In addition, we introduce a polydimethylsiloxane (PDMS) layer between the two metasurfaces; thus, we can achieve tunable function through temperature. This provides an integrated fiber multifunctional optical device in the mid-infrared band, which is expected to play an important role in the fields of high-power mid-infrared lasers, mid-infrared laser biomedicine, and gas trace detection. Full article
(This article belongs to the Special Issue Advances in Photonic Metasurfaces and Metastructures)
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