Symmetrical Studies in Optical Materials

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

Deadline for manuscript submissions: 30 December 2026 | Viewed by 920

Special Issue Editors


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Guest Editor
Laboratory of Condensed Matter and Interdisciplinary Sciences, Department of Physics, Faculty of Sciences, Mohammed V University, B.P. 1014 RP, Rabat, Morocco
Interests: DFT calculations; electronic and optical properties; photovoltaic applications; perovskite compounds; thermodynamic stability; Monte Carlo simulation; NRBS

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Guest Editor
1. Laboratory of Condensed Matter and Interdisciplinary Sciences, Department of Physics, Faculty of Sciences, Mohammed V University, B.P. 1014 RP, Rabat, Morocco
2. Laboratory of Materials, Energy and Environment (LaMEE), Physics Department, Faculty of Sciences Semlalia, Cadi Ayyad University, B.P. 2390, Marrakech, Morocco
Interests: thin films; materials for electronics and solar cells; conducting polymers; hybrid photovoltaic cells; optical, electrical and physical characterization of materials

Special Issue Information

Dear Colleagues,

Optical materials in the most general sense can be defined as materials whose function is to modify or control electromagnetic radiation in the ultraviolet (UV), visible, or infrared (IR) spectral regions.

Symmetry plays a fundamental role in the properties of optical materials. In optics, symmetry refers to the way in which a material or system retains its properties under certain geometric transformations, such as rotation, reflection, or translation. This symmetry influences many optical phenomena, such as the reflection, transmission, polarisation, and dispersion of light.

Symmetry in optical materials affects their behaviour with respect to light in fundamental ways, and is a crucial tool for designing optical devices such as lasers, modulators, and optical fibres.

We welcome submissions of manuscripts within the scope of this Special Issue.

Prof. Dr. El Bounagui Omar
Dr. Abdelmajid El Mansouri
Guest Editors

Manuscript Submission Information

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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

  • optoelectronic devices
  • nanomaterials
  • DFT calculations
  • experimental characterisation
  • thin films
  • renewable energy
  • conducting polymers
  • hybrid solar cells
  • perovskite materials
  • optical materials

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Published Papers (1 paper)

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Research

9 pages, 676 KB  
Article
Pure Transverse Phonon-Polaritons in Laterally Bounded Piezoelectric Superlattices
by Wen-Chao Bai, Xin-Yuan Liu, Xin-Yi Hu, Gui-Xiang Liu, Ben-Hu Zhou, Ge Tang and Han-Zhuang Zhang
Symmetry 2026, 18(4), 607; https://doi.org/10.3390/sym18040607 - 3 Apr 2026
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Abstract
Existing studies on transverse phonon-polaritons in one-dimensional piezoelectric superlattices, based on the assumption of infinite lateral dimensions (perpendicular to the periodic direction of ferroelectric domains), have shown that only transverse superlattice vibrations with a strain component along the periodic direction can couple with [...] Read more.
Existing studies on transverse phonon-polaritons in one-dimensional piezoelectric superlattices, based on the assumption of infinite lateral dimensions (perpendicular to the periodic direction of ferroelectric domains), have shown that only transverse superlattice vibrations with a strain component along the periodic direction can couple with electromagnetic waves to generate transverse phonon-polaritons. Real samples, however, inevitably have finite lateral dimensions, indicating that the infinite-lateral-size model requires modification. In this study, we find that in laterally finite systems, pure transverse superlattice vibrations (those without any strain component along the periodic direction) can also couple with electromagnetic waves, giving rise to a new class of pure transverse phonon-polaritons. Theoretical analysis reveals that the energy of this mode is primarily confined to the crystal surface and propagates as surface waves. Experimental verification confirms the existence of this polariton, and this result provides a new degree of freedom for the design of microwave devices based on piezoelectric superlattices. Full article
(This article belongs to the Special Issue Symmetrical Studies in Optical Materials)
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