Optical Spectroscopy Characterizations of Low-Dimensional Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1405

Special Issue Editors


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Guest Editor
State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
Interests: low-dimensional nanomaterials; optical anisotropy; spectroscopic characterization; heterostructures

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Guest Editor
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: optical metrology; ellipsometry and polarimetry; ultra-thin films; low-dimensional materials

Special Issue Information

Dear Colleagues,

Optical spectroscopy enables the precise measurement of materials at atomic, molecular, and macromolecular scales, which is a pivotal tool that aids in understanding, manufacturing, and controlling matter engineering of low-dimensional materials, heterostructures, and nanosystems. In particular, with the ultimate pursuit of decreased thickness approaching single atomic layer levels, low-dimensional materials can exhibit novel or distinct properties compared with their counterpart bulk materials, which could be revealed with the help of optical spectroscopy methods, including linear, non-linear, and photoelectron spectroscopy methods. Besides, due to their inherently small size, accurately characterizing the fundamental physical and chemical properties of low-dimensional materials is still challenging, and novel approaches promoting sensitivity, resolution, speed, model fitting, etc., are highly desired.   

This Special Issue focuses on the current state-of-the-art in characterizing low-dimensional materials via optical spectroscopy and the advanced development of optical spectroscopy instrumentations applied for unique application scenarios, such as in situ growth monitoring, manipulating and defect engineering, etc. It aims to attract both academic and industrial researchers in order to foster the current knowledge of low-dimensional materials and applications, and to present new ideas for characterizing technologies.

We look forward to receiving your contributions.

Dr. Wanfu Shen
Dr. Honggang Gu
Guest Editors

Manuscript Submission Information

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Keywords

  • low-dimensional materials
  • optical spectroscopy
  • optical spectroscopy instrumentations
  • in situ monitoring
  • low-symmetrical materials
  • heterostructures
  • defect engineering

Published Papers (1 paper)

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Research

12 pages, 2635 KiB  
Article
Quantitatively Exploring Giant Optical Anisotropy of Quasi-One-Dimensional Ta2NiS5
by Qihang Zhang, Honggang Gu, Zhengfeng Guo, Ke Ding and Shiyuan Liu
Nanomaterials 2023, 13(24), 3098; https://doi.org/10.3390/nano13243098 - 7 Dec 2023
Viewed by 1142
Abstract
Optical anisotropy offers a heightened degree of flexibility in shaping optical properties and designing cutting-edge devices. Quasi-one-dimensional Ta2NiS5, with giant optical anisotropy, has been used in the development of new lasers and sensors. In this research endeavor, we successfully [...] Read more.
Optical anisotropy offers a heightened degree of flexibility in shaping optical properties and designing cutting-edge devices. Quasi-one-dimensional Ta2NiS5, with giant optical anisotropy, has been used in the development of new lasers and sensors. In this research endeavor, we successfully acquired the complete dielectric tensor of Ta2NiS5, utilizing the advanced technique of Mueller matrix spectroscopic ellipsometry, enabling a rigorous quantitative assessment of its optical anisotropy. The results indicate that Ta2NiS5 demonstrates giant birefringence and dichroism, with Δnmax = 1.54 and Δkmax = 1.80. This pursuit also delves into the fundamental underpinnings of this optical anisotropy, drawing upon a fusion of first-principles calculations and critical points analysis. The anisotropy of Ta2NiS5 arises from differences in optical transitions in different directions and is shown to be due to van Hove singularities without exciton effects. Its giant optical anisotropy is expected to be useful in the design of novel optical devices, and the revelation of the physical mechanism facilitates the modulation of its optical properties. Full article
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