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Electromagnetic Metasurfaces and Metamaterials: From Design to Applications

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

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 1632

Special Issue Editor

Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
Interests: microwave propagation; microwave non-destructive evaluation; metamaterials; metasurfaces; photonic crystals

Special Issue Information

Dear Colleagues,

Controlling electromagnetic wave propagation gives us the leverage to design novel devices for a variety of applications. The artificial arrangement of periodic structures of dielectric and magnetic materials opens up a new class of materials, called Metamaterials and Metasurfaces, which can be used to realize exotic electromagnetic properties. Metamaterials and Metasurfaces provide the scope to develop efficient devices for communication systems, near and far-field imaging, non-destructive evaluation, sensing, energy harvesting, etc. With applications ranging from microwave to optical frequencies and devices ranging from antennas to beam shapers to high efficient polarization converters, there is a huge scope for innovative ideas to design, fabricate, and test these devices. Coupled with novel manufacturing technologies such as additive manufacturing and high-efficiency computational platforms, Metamaterials and Metasurfaces provide a superb platform for the research community to effectively utilize the control over the electromagnetic wave propagation.

This Special Issue, “Metamaterials and Metasurfaces: From Design to Applications” gives electromagnetic researchers a special opportunity to disseminate their research ideas, novel devices, computational aspects, and new fabrication methods. The topics that are broadly covered include, but are not limited to: spatial and temporal photonic crystals; passive and active metamaterials; topological metamaterials; metasurfaces; plasmonic devices; computational electromagnetics; inverse algorithm; non-destructive evaluation; novel fabrication techniques such as additive manufacturing techniques and nano-fabrication methods.

Your research contribution in this journal would encourage the electromagnetic research community to further enhance their knowledge base and industrial interaction.

Prof. Dr. Venkatachalam Subramanian
Guest Editor

Manuscript Submission Information

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Keywords

  • spatial and temporal photonic crystals
  • active and passive metamaterials
  • metasurfaces
  • computational electromagnetics
  • novel manufacturing processes for electromagnetic devices
  • non-destructive evaluation
  • frequency selective surfaces

Published Papers (2 papers)

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Research

13 pages, 1820 KiB  
Article
An Optically Transparent Metamaterial Absorber with Tunable Absorption Bandwidth and Low Infrared Emissivity
Materials 2023, 16(23), 7357; https://doi.org/10.3390/ma16237357 - 26 Nov 2023
Viewed by 539
Abstract
A transparent metamaterial absorber (MMA) with both tunable absorption bandwidth and low infrared (IR) emissivity is proposed in this paper. The MMA is hierarchical, which consists of an infrared shielding layer (IRSL), two radar-absorption layers (RALs), an air/water layer, and an indium–tin–oxide (ITO) [...] Read more.
A transparent metamaterial absorber (MMA) with both tunable absorption bandwidth and low infrared (IR) emissivity is proposed in this paper. The MMA is hierarchical, which consists of an infrared shielding layer (IRSL), two radar-absorption layers (RALs), an air/water layer, and an indium–tin–oxide (ITO) backplane from the top downwards. The IRSL and the RALs are made of ITO patterns etched on polyethylene terephthalate (PET) substrates. By changing the thickness of the water, the 90% absorption bandwidth can be tuned from 6.4–11.3 GHz to 12.7–20.6 GHz, while retaining good polarization and angular stability. An equivalent circuit model (ECM) is present, to reveal the physical mechanism of absorption. The proposed MMA has a low theoretical IR emissivity of about 0.24. A sample was fabricated and measured, and the experimental results are consistent with the simulation results, showing its potential applications in stealth glass and multifunctional radome. Full article
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10 pages, 4610 KiB  
Article
Low Profile Dual-Band Polarization Conversion Metasurface with Omnidirectional Polarization
Materials 2023, 16(12), 4347; https://doi.org/10.3390/ma16124347 - 13 Jun 2023
Viewed by 614
Abstract
In this work, a dual-band transmissive polarization conversion metasurface (PCM), with omnidirectional polarization and low profile, is proposed. The periodic unit of the PCM is composed of three metal layers separated by two substrates. The upper patch layer of the metasurface is the [...] Read more.
In this work, a dual-band transmissive polarization conversion metasurface (PCM), with omnidirectional polarization and low profile, is proposed. The periodic unit of the PCM is composed of three metal layers separated by two substrates. The upper patch layer of the metasurface is the patch-receiving antenna, while the bottom layer is the patch-transmitting antenna. Both antennas are arranged in an orthogonal way so that the cross-polarization conversion can be realized. The equivalent circuit analysis, structure design, and experimental demonstration are conducted in detail, the polarization conversion rate (PCR) is greater than 90% within two frequency bands of 4.58–4.69 GHz and 5.33–5.41 GHz, and the PCR at two center operating frequencies of 4.64 GHz and 5.37 GHz is as high as 95%, with a thickness of only 0.062λL, where λL is the free space wavelength at the lowest operating frequency. The PCM can realize a cross-polarization conversion, when the incident linearly polarized wave at an arbitrary polarization azimuth, which indicates that it has the characteristics of omnidirectional polarization. Full article
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