Advances in Nonlinear Optics and Symmetry

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Chemistry: Symmetry/Asymmetry".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 4104

Special Issue Editors


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Guest Editor
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences, Fuzhou 350002, China
Interests: theory of nonlinear phenomena such as nonlinear optical and multiferroic properties of solid materials; electronic structures theory based on first-principles methods and model studies; superconductivity and many-body interactions such as electron–phonon, electron–magnon; rare-earth-based laser crystals and other luminescent materials; theory and first-principles study of photo-catalysis

E-Mail Website
Guest Editor
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences, Fuzhou 350002, China
Interests: materials chemistry; electronic band structure calculations; high-throughput computational materials design; optical properties; superconductivity; structure–property correlations

Special Issue Information

Dear Colleagues,

The study of nonlinear optics is closely related to symmetry. For example, second-order nonlinear optical interactions (described by a χ(2) susceptibility) can occur only in noncentrosymmetric crystals—that is, in crystals that do not display inversion symmetry. The study of how to obtain materials without inversion symmetry is a critical issue in the design and synthesis of new nonlinear optical materials. Moreover, the essential properties for nonlinear optical materials including second harmonic generation tensor and birefringence are also determined by symmetry (i.e., crystal symmetry, intrinsic symmetry, and Kleinman symmetry). Therefore, symmetry is also a topic of intensive investigation in the structure–property relationship in nonlinear optical materials.

This Special Issue invites researchers to submit original research papers and review articles related to nonlinear optical materials in which theoretical or experimental issues of symmetry are considered. The topics of interest include but are not limited to: 

  • Symmetry in second-order nonlinear optical response;
  • Symmetry in third-order nonlinear optical response;
  • Symmetry in phase matching;
  • Symmetry in structure–property relationships;
  • Synthesis of noncentrosymmetric crystals;
  • Theoretical design of noncentrosymmetric structure.

Dr. Shuiquan Deng
Dr. Xiyue Cheng
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

  • noncentrosymmetric
  • nonlinear optical materials
  • second harmonic generation
  • inversion symmetry
  • phase matching

Published Papers (2 papers)

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Research

11 pages, 3401 KiB  
Article
K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide
by Zi-Xuan Wu, Wen-Fa Chen, Bin-Wen Liu, Xiao-Ming Jiang and Guo-Cong Guo
Symmetry 2023, 15(1), 236; https://doi.org/10.3390/sym15010236 - 15 Jan 2023
Cited by 1 | Viewed by 1594
Abstract
A quaternary metal chalcogenide, namely K2CdGe3S8 (I), is obtained through a high-temperature solid-state approach. Compound I crystallizes with the non-centrosymmetric space group P212121. It features a 2D layer structure [...] Read more.
A quaternary metal chalcogenide, namely K2CdGe3S8 (I), is obtained through a high-temperature solid-state approach. Compound I crystallizes with the non-centrosymmetric space group P212121. It features a 2D layer structure with [CdGe3S8] layers consisting of tetrahedral GeS4 and CdS4 units, and counter K+ embedded between the layers. The compound exhibits a powder second-harmonic generation (SHG) response of ~0.1 times that of KH2PO4 (KDP) with phase-matchable character at the laser wavelength of 1064 nm. Remarkably, it has a wide band gap (3.20 eV), which corresponds to a favorable high laser-induced damage threshold of 6.7 times that of AgGaS2. In addition, the calculated birefringence (Δn) is 0.039 at the wavelength of 1064 nm, which satisfies the Δn criteria for a promising infrared NLO material. Full article
(This article belongs to the Special Issue Advances in Nonlinear Optics and Symmetry)
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10 pages, 2332 KiB  
Article
AgGaGeSe4: An Infrared Nonlinear Quaternary Selenide with Good Performance
by Junhui Dang, Naizheng Wang, Jiyong Yao, Yuandong Wu, Zheshuai Lin and Dajiang Mei
Symmetry 2022, 14(7), 1426; https://doi.org/10.3390/sym14071426 - 12 Jul 2022
Cited by 1 | Viewed by 1491
Abstract
The symmetry of crystals is an extremely important property of crystals. Crystals can be divided into centrosymmetric and non-centrosymmetric crystals. In this paper, an infrared (IR) nonlinear optical (NLO) material AgGaGeSe4 was synthesized. The related performance analysis, nonlinear optical properties, and first-principle [...] Read more.
The symmetry of crystals is an extremely important property of crystals. Crystals can be divided into centrosymmetric and non-centrosymmetric crystals. In this paper, an infrared (IR) nonlinear optical (NLO) material AgGaGeSe4 was synthesized. The related performance analysis, nonlinear optical properties, and first-principle calculation of AgGaGeSe4 were also introduced in detail. In the AgGaGeSe4 structure, Ge4+ was replaced with Ga3+ and produced the same number of vacancies at the Ag+ position. The low content of Ge doping kept the original chalcopyrite structure and improved its optical properties such as the band gap. The UV-Vis diffuse reflection spectrum shows that the experimental energy band gap of AgGaGeSe4 is 2.27 eV, which is 0.48 eV larger than that of AgGaSe2 (1.79 eV). From the perspective of charge-transfer engineering strategy, the introduction of Group IV Ge elements into the crystal structure of AgGaSe2 effectively improves its band gap. The second harmonic generation (SHG) effect of AgGaGeSe4 is similar to that of AgGaSe2, and at 1064 nm wavelength, the birefringence of AgGaGeSe4 is 0.03, which is greater than that of AgGaSe2 (∆n = 0.02). The results show that AgGaGeSe4 possessed better optical properties than AgGaSe2, and can been broadly applied as a good infrared NLO material. Full article
(This article belongs to the Special Issue Advances in Nonlinear Optics and Symmetry)
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