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Symmetry
Special Issues
Advances in Optics and Symmetry/Asymmetry
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Advances in Optics and Symmetry/Asymmetry

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

Deadline for manuscript submissions: closed (15 April 2024) | Viewed by 3732

Special Issue Editors

Prof. Dr. Jing Zhou

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Guest Editor
Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
Interests: multi-mode infrared detection (intensity, spectrum, polarization…); nanophotonics; metamaterials; plasmonics; semiconductor physics
Dr. Guanhai Li

E-Mail Website
Guest Editor
Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
Interests: metasurface; infrared single photon detector; plasmonics
Dr. Xinchao Lu

E-Mail Website
Guest Editor
Institute of Microelectronics, Chinese Academy of Sciences, Beijing, China
Interests: plasmonic imaging; biosensing; nanophotonics; terahertz devices
Dr. Yin Xu

E-Mail Website
Guest Editor
Department of Electronic Engineering, School of IoT Engineering, Jiangnan University, Wuxi 214122, China
Interests: silicon-based photonics and optoelectronic integrated devices; polarization control on new silicon substrate; high-efficiency silicon-optical hybrid modulation; multi-physics control of lithium niobate thin film; integrated circuit design and process research

Special Issue Information

Dear Colleagues,

Symmetry plays an important role in optics. The light field is substantially influenced by different types of space symmetries, such as mirror symmetry, lateral inversion, and translational and rotational symmetry. The careful design of symmetric or asymmetric structures and lattices can lead to many extraordinary optical effects, including the photonic spin Hall effect, super chirality, and robust unidirectional propagation, and they each have promising applications in metamaterials, plasmonics, and photonic integrated circuits. On the other hand, broken symmetries in space–time induce coalescence of the eigenstates at exceptional points, where rich topological features are exhibited, and these systems have great potential for use in many application areas, such as sensing, lasing, optical isolation, and so on.

In this Special Issue of Symmetry, we are interested in topics related to symmetry/asymmetry problems in optics, and ask for your help to explore the extraordinary properties of the systems with specific symmetries/asymmetries, and their applications in all fields of optics.

Dr. Jing Zhou
Dr. Guanhai Li
Dr. Xinchao Lu
Dr. Yin Xu
Guest Editors

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

  • symmetry breaking
  • chiral
  • space–time
  • topology
  • light field manipulation
  • light–matter interaction

Published Papers (3 papers)

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Research

12 pages, 3034 KiB  
Article
Investigation of the Optical Spectra of Barium-Zinc (Aluminum) Fluoroborates and Barium-Zinc Fluorocarbonate from First Principles
by Yurii N. Zhuravlev and Victor V. Atuchin
Symmetry 2023, 15(8), 1504; https://doi.org/10.3390/sym15081504 - 28 Jul 2023
Cited by 1 | Viewed by 720
Abstract
The Raman scattering, infrared absorption, and reflection spectra of hexagonal non-centrosymmetric BaZnBO3F and BaAlBO3F2 and centrosymmetric BaZn3BO3F2 and BaZnCO3F2 are calculated using the standard procedures of the CRYSTAL package with [...] Read more.
The Raman scattering, infrared absorption, and reflection spectra of hexagonal non-centrosymmetric BaZnBO3F and BaAlBO3F2 and centrosymmetric BaZn3BO3F2 and BaZnCO3F2 are calculated using the standard procedures of the CRYSTAL package with the basis of localized orbitals and the B3LYP hybrid functional within the framework of the Hartree-Fock conjugate perturbation method. It is shown that the layered structure of crystals manifests itself in the spectra of vibrational modes polarized along and perpendicular to the c axis with wavenumbers for the lattice region formed by displacements of atoms in [BaF]∞ and [MAO3]∞ (M: Zn, Al; A: B, C) layers, for molecular deformation outside and in the plane of anions BO3 and CO3. The quantitative and qualitative composition of the spectra is determined by the symmetry of the crystal lattice. Full article
(This article belongs to the Special Issue Advances in Optics and Symmetry/Asymmetry)
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18 pages, 2254 KiB  
Article
Electronic and Optical Properties of Alkaline Earth Metal Fluoride Crystals with the Inclusion of Many-Body Effects: A Comparative Study on Rutile MgF2 and Cubic SrF2
by Giancarlo Cappellini, Jürgen Furthmüller, Friedhelm Bechstedt and Silvana Botti
Symmetry 2023, 15(2), 539; https://doi.org/10.3390/sym15020539 - 17 Feb 2023
Cited by 2 | Viewed by 1344
Abstract
We conducted a systematic investigation using state-of-the-art techniques on the electronic and optical properties of two crystals of alkaline earth metal fluorides, namely rutile MgF2 and cubic SrF2. For these two crystals of different symmetry, we present density functional theory [...] Read more.
We conducted a systematic investigation using state-of-the-art techniques on the electronic and optical properties of two crystals of alkaline earth metal fluorides, namely rutile MgF2 and cubic SrF2. For these two crystals of different symmetry, we present density functional theory (DFT), many-body perturbation theory (MBPT), and Bethe–Salpeter equation (BSE) calculations. We calculated a variety of properties, namely ground-state energies, band-energy gaps, and optical absorption spectra with the inclusion of excitonic effects. The quantities were obtained with a high degree of convergence regarding all bulk electronic and optical properties. Bulk rutile MgF2 has distinguished ground-state and excited-state properties with respect to the other cubic fluoride SrF2 and the other members of the alkaline earth metal fluoride family. The nature of the fundamental gaps and estimates of the self-energy and excitonic effects for the two compounds are presented and discussed in detail. Our results are in good accordance with the measurements and other theoretical–computational data. A comparison is made between the excitation and optical properties of bulk rutile MgF2, cubic SrF2, and the corresponding clusters, for which calculations have recently been published, confirming strong excitonic effects in finite-sized systems. Full article
(This article belongs to the Special Issue Advances in Optics and Symmetry/Asymmetry)
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10 pages, 4178 KiB  
Article
On-Chip Design of a Broadband 850 nm TM-Pass/TE-Stop Polarizer with Tilted Subwavelength Gratings
by Yue Dong, Yu Liu, Yin Xu and Bo Zhang
Symmetry 2022, 14(11), 2359; https://doi.org/10.3390/sym14112359 - 09 Nov 2022
Cited by 2 | Viewed by 1040
Abstract
An integrated TM-pass/TE-stop polarizer centered at 850 nm is designed in this paper. The proposed polarizer is designed on a Si3N4 on insulator platform with tilted subwavelength gratings (SWG). Since the tilted SWGs have much more of an impact on [...] Read more.
An integrated TM-pass/TE-stop polarizer centered at 850 nm is designed in this paper. The proposed polarizer is designed on a Si3N4 on insulator platform with tilted subwavelength gratings (SWG). Since the tilted SWGs have much more of an impact on the effective index of the TE polarization state than that of the TM polarization state, they help to achieve high TM and low TE transmission simultaneously. After geometries optimization, the polarizer’s working bandwidth, which is defined as the wavelength region with an extinction ratio higher than 20 dB, is determined to be 185 nm under a SWG tilting angle of 30 degrees. At the same time, the insertion loss is always less than 0.45 dB over the entire working wavelength band. Finally, the results of fabrication tolerance analysis show that the SWG ridge width jitter only degrades the polarizer’s working bandwidth by 16 nm. Full article
(This article belongs to the Special Issue Advances in Optics and Symmetry/Asymmetry)
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