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Nonlinear Optical Materials: From Materials to Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Cross-Field Chemistry".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 1412

Special Issue Editor


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Guest Editor
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
Interests: molecular design; synthesis and photoelectric function research of organic/polymer functional materials

Special Issue Information

Dear Colleagues,

Nonlinear Optical Material (NOM) is a widely used and versatile material with excellent nonlinear optical properties. It has received widespread attention in many fields such as optoelectronic components, optoelectronic functional energy, optoelectronic communication, and sensor devices in high tech and has been continuously developed and applied in light transmission, modulation, and reception. Advanced nonlinear optical materials can effectively control their own properties and optical field regulation characteristics, thereby achieving many photoelectric functions such as laser devices (mode locking, Q-switching, harmonics, optical limiting), nonlinear optical modulators (optical switches, frequency doubling and mixing, bistability), communication detection, and so on.

At present, research mainly focuses on the following fields: nonlinear optical theory: nonlinear optical problems in ultra-strong and ultra-fast laser light fields, terahertz wave nonlinear optical physics, and other particle physics fields; nonlinear optical materials: metal, semiconductor, organic and inorganic materials, organic–inorganic hybrid materials, composite materials, etc.; device design and application research: micro/nano optical field regulation, optical information processing, optical storage, micro/nano optical devices, etc.; laser field: laser regulation, laser emission materials, mode locking, Q-switching, harmonic, optical limiting; laser communication and technology: nonlinear optical modulators, etc.

Areas of interest include, but are not limited to, the following:

  • Organic nonlinear optical materials.
  • Inorganic nonlinear optical materials.
  • Organic–inorganic hybrid materials.
  • Nonlinear optical modulators.     
  • Design and preparation strategies based on novel nonlinear optical materials.
  • Nonlinear optical properties and application performance regulation of materials.
  • Metals, metal oxides, semiconductors, and organic–inorganic hybrid materials.
  • Semiconductor nonlinear optics: optical frequency conversion technology.
  • Nonlinear optics: optical Kerr, optical switch, optical limiting, second-order and third-order nonlinearity, degenerate four-wave mixing, z-scan, SHG, and electric field induced SHG.

Dr. Fenggang Liu
Guest Editor

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Keywords

  • nonlinear optical material
  • electro-optic coefficient
  • optical waveguide
  • chromophore
  • terahertz
  • modulator
  • second-order and third-order nonlinearity
  • optoelectronic

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Published Papers (2 papers)

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Research

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14 pages, 2742 KiB  
Article
1D Lead Bromide Hybrids Directed by Complex Cations: Syntheses, Structures, Optical and Photocatalytic Properties
by Ya-Qi Liu, Sen Huang, Ji-Dong Leng and Wei-Quan Lin
Molecules 2024, 29(17), 4217; https://doi.org/10.3390/molecules29174217 - 5 Sep 2024
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Abstract
This study presents the synthesis, structural characterization, and evaluation of the photocatalytic performance of two novel one-dimensional (1D) lead(II) bromide hybrids, [Co(2,2′-bpy)3][Pb2Br6CH3OH] (1) and [Fe(2,2′-bpy)3][Pb2Br6] (2 [...] Read more.
This study presents the synthesis, structural characterization, and evaluation of the photocatalytic performance of two novel one-dimensional (1D) lead(II) bromide hybrids, [Co(2,2′-bpy)3][Pb2Br6CH3OH] (1) and [Fe(2,2′-bpy)3][Pb2Br6] (2), synthesized via solvothermal reactions. These compounds incorporate transition metal complex cations as structural directors, contributing to the unique photophysical and photocatalytic properties of the resulting materials. Single-crystal X-ray diffraction analysis reveals that both compounds crystallize in monoclinic space groups with distinct 1D lead bromide chain configurations influenced by the nature of the complex cations. Optical property assessments show band gaps of 3.04 eV and 2.02 eV for compounds 1 and 2, respectively, indicating their potential for visible light absorption. Photocurrent measurements indicate a significantly higher electron–hole separation efficiency in compound 2, correlated with its narrower band gap. Additionally, photocatalytic evaluations demonstrate that while both compounds degrade organic dyes effectively, compound 2 also exhibits notable hydrogen evolution activity under visible light, a property not observed in 1. These findings highlight the role of metal complex cations in tuning the electronic and structural properties of lead(II) bromide hybrids, enhancing their applicability in photocatalytic and optoelectronic devices. Full article
(This article belongs to the Special Issue Nonlinear Optical Materials: From Materials to Applications)
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Review

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21 pages, 6988 KiB  
Review
Organic Electro-Optic Materials with High Electro-Optic Coefficients and Strong Stability
by Shuhui Feng, Shuangke Wu, Weijun Zhang, Fenggang Liu and Jiahai Wang
Molecules 2024, 29(13), 3188; https://doi.org/10.3390/molecules29133188 - 4 Jul 2024
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Abstract
The preparation of high-performance electro-optical materials is one of the key factors determining the application of optoelectronic communication technology such as 5G communication, radar detection, terahertz, and electro-optic modulators. Organic electro-optic materials have the advantage of a high electro-optic coefficient (~1000 pm/V) and [...] Read more.
The preparation of high-performance electro-optical materials is one of the key factors determining the application of optoelectronic communication technology such as 5G communication, radar detection, terahertz, and electro-optic modulators. Organic electro-optic materials have the advantage of a high electro-optic coefficient (~1000 pm/V) and could allow the utilization of photonic devices for the chip-scale integration of electronics and photonics, as compared to inorganic electro-optic materials. However, the application of organic nonlinear optical materials to commercial electro-optic modulators and other fields is also facing technical bottlenecks. Obtaining an organic electro-optic chromophore with a large electro-optic coefficient (r33 value), thermal stability, and long-term stability is still a difficulty in the industry. This brief review summarizes recent great progress and the strategies to obtain high-performance OEO materials with a high electro-optic coefficient and/or strong long-term stability. The configuration of D-π-A structure, the types of materials, and the effects of molecular engineering on the electro-optical coefficient and glass transition temperature of chromophores were summarized in detail. The difficulties and future development trends in the practical application of organic electro-optic materials was also discussed. Full article
(This article belongs to the Special Issue Nonlinear Optical Materials: From Materials to Applications)
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