Effect of femtosecond laser irradiation on structure-terahertz property relationship in sodium borosilicate glasses

IF 2.1 3区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Glass Science Pub Date : 2023-04-07 DOI:10.1111/ijag.16634

Nicholas J. Tostanoski, Randall E. Youngman, S. K. Sundaram

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Abstract

We report the effect of high-repetition rate femtosecond (fs) laser irradiation on structure-terahertz (THz) property relationship for sodium borosilicate glasses. We have used nuclear magnetic resonance (NMR), terahertz time-domain spectroscopy (THz-TDS), and Raman spectroscopy to examine pristine and laser irradiated regions of these glasses to determine and quantify boron speciation, THz refractive index, n(THz), and change (Δn) in n(THz), and spectral, that is, structural, changes due to laser exposure, respectively. Our results suggest that laser irradiation-induced Δn(THz) values are dependent upon the glass composition, structural units, connectivity, and network, for example, the corresponding K- and R-values of the borosilicate glass. Depolymerized glass networks show no changes in NMR B₄ signal, slight changes in Raman spectral changes related to silicate structural units, for example, increase in Q³ tetrahedra with one nonbridging oxygen (nbO) atom, and higher measurable n(THz) and Δn(THz). More polymerized glasses, on the other hand, show changes in NMR B₄ signal, varying degrees of Raman spectral changes in the borate subnetwork and structural units, and lower n(THz) and Δn(THz). The THz refractive index is most sensitive to modifier ions in the glasses, which are directly responsible for nbO formation, glass structure, and network polymerization.

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飞秒激光辐照对硼硅酸钠玻璃结构-太赫兹特性关系的影响

我们报道了高重复率飞秒激光辐照对硼硅酸钠玻璃结构太赫兹特性关系的影响。我们使用核磁共振（NMR）、太赫兹时域光谱（THz-TDS）和拉曼光谱来检查这些玻璃的原始区域和激光照射区域，以分别确定和量化硼的形态、太赫兹折射率、n（THz）和n（THz）的变化（Δn），以及光谱，即结构，由于激光照射而发生的变化。我们的结果表明，激光辐照诱导的Δn（THz）值取决于玻璃成分、结构单元、连接性和网络，例如，硼硅酸盐玻璃的相应K值和R值。解聚玻璃网络显示NMR B4信号没有变化，拉曼光谱变化与硅酸盐结构单元有关，例如，具有一个非桥氧（nbO）原子的Q3四面体增加，以及更高的可测量n（THz）和Δn（THz）。另一方面，更多聚合的玻璃显示NMR B4信号的变化，硼酸盐子网络和结构单元中不同程度的拉曼光谱变化，以及较低的n（THz）和Δn（THz）。THz折射率对玻璃中的改性剂离子最敏感，改性剂对nbO的形成、玻璃结构和网络聚合直接负责。

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来源期刊

International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-

CiteScore

4.50

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.