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Symmetry
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Symmetry in Electromagnetic Engineering and Optics: Latest Advances and Prospects
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Symmetry in Electromagnetic Engineering and Optics: Latest Advances and Prospects

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 4130

Special Issue Editor

Dr. Giovanni Angiulli

E-Mail Website
Guest Editor
Department of Information Engineering, Infrastructure and Sustainable Energy, University Mediterranea, Via Graziella, loc. Feo di Vito, 89122 Reggio Calabria, Italy
Interests: computational electromagnetics; electromagnetic theory; metamaterials; microwave engineering; surrogate modeling; soft computing; NDT/E
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The idea of symmetry, aided by the formalism of modern abstract algebra, has served as the framework through which various physical disciplines, from quantum mechanics to crystallography, have been fully developed. Additionally, symmetry plays a relevant role in electromagnetics; to elucidate this point, it suffices to consider the concepts of duality between magnetic and electric sources, reciprocity, and equivalence. In addition, symmetry comes into play through the geometrical characteristics of the objects involved in the electromagnetic scenario. Currently, the sciences of the natural world exploit symmetry to model nature based on observations of symmetry in molecules, crystals and elementary particles, for example. In contrast, electromagnetic engineering and optics exploit this concept more extensively, namely, for modelling the physical phenomena and the apparatus’ behaviour and for characterising new types of devices whose potential properties are not apparent without using this abstraction.

The Special Issue would like to collect the latest advances and prospects of the mathematical techniques related to symmetry in the fields of electromagnetic engineering and optics. Scholars in related areas are invited to contribute their latest research results to this Special Issue.

Topics of the research papers include but are not limited to:

  • Microwave and Optics devices;
  • Wave propagation and Scattering;
  • Antennas;
  • Electromagnetic media;
  • Metamaterials.

Prof. Dr. Giovanni Angiulli
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. Symmetry is an international peer-reviewed open access monthly 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 2400 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

  • point symmetry groups
  • lie groups
  • lie algebras
  • mirror symmetries
  • self-similarity
  • self-affinity
  • spinors
  • fractal and fractal dimension
  • periodic structures

Published Papers (2 papers)

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Research

21 pages, 17461 KiB  
Article
Analysis of Symmetric Electromagnetic Components Using Magnetic Group Theory
by Victor Dmitriev, Dimitrios C. Zografopoulos and Luis P. V. Matos
Symmetry 2023, 15(2), 415; https://doi.org/10.3390/sym15020415 - 03 Feb 2023
Cited by 1 | Viewed by 1382
Abstract
We discuss a method of analysis of symmetric electromagnetic components with magnetic media based on magnetic group theory. In this description, some of the irreducible corepresentations assume complex values exp(iθ) with the real parameter θ. A possible physical [...] Read more.
We discuss a method of analysis of symmetric electromagnetic components with magnetic media based on magnetic group theory. In this description, some of the irreducible corepresentations assume complex values exp(iθ) with the real parameter θ. A possible physical interpretation of this parameter is given. We demonstrate the application of the symmetry-adapted linear combination method combined with the corepresentation theory to the problem of current modes in an array of magnetized graphene elements where Faraday and Kerr effects can exist. The elements are described by the magnetic symmetry C4 or C4v(C4). The scattering matrix of the array and its eigensolutions are defined and analyzed and some numerical simulations are presented as well. An example of a waveguide described by symmetry C4v(C2v) with a specific type of degeneracy is also discussed. Full article
(This article belongs to the Special Issue Symmetry in Electromagnetic Engineering and Optics: Latest Advances and Prospects)
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10 pages, 1757 KiB  
Article
A Third Angular Momentum of Photons
by Pathik Sahoo, Pushpendra Singh, Jhimli Manna, Ravindra P. Singh, Jonathan P. Hill, Tomonobu Nakayama, Subrata Ghosh and Anirban Bandyopadhyay
Symmetry 2023, 15(1), 158; https://doi.org/10.3390/sym15010158 - 05 Jan 2023
Cited by 2 | Viewed by 2152
Abstract
Photons that acquire orbital angular momentum move in a helical path and are observed as a light ring. During helical motion, if a force is applied perpendicular to the direction of motion, an additional radial angular momentum is introduced, and alternate dark spots [...] Read more.
Photons that acquire orbital angular momentum move in a helical path and are observed as a light ring. During helical motion, if a force is applied perpendicular to the direction of motion, an additional radial angular momentum is introduced, and alternate dark spots appear on the light ring. Here, a third, centrifugal angular momentum has been added by twisting the helical path further according to the three-step hierarchical assembly of helical organic nanowires. Attaining a third angular momentum is the theoretical limit for a photon. The additional angular momentum converts the dimensionless photon to a hollow spherical photon condensate with interactive dark regions. A stream of these photon condensates can interfere like a wave or disintegrate like matter, similar to the behavior of electrons. Full article
(This article belongs to the Special Issue Symmetry in Electromagnetic Engineering and Optics: Latest Advances and Prospects)
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