Terahertz-time domain spectroscopy and optical characterization of germanate glass systems for photonic applications

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of Non-crystalline Solids Pub Date : 2025-02-15 Epub Date: 2024-12-30 DOI:10.1016/j.jnoncrysol.2024.123369

Haramanpreet Kaur , Ruturaj Puranik , Vibhavari Parkar , Snehal Haldankar , Fathimath Faseela , Shriganesh Prabhu , Sandeep Kaur , Neetu Verma , Gopi Sharma

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Abstract

The present work deals with the effect of the sodium content on the thermal, structural, ellipsometric, and THz properties of germanate glasses. The sodium germanate glasses of composition xNa₂O.(100-x)GeO₂ with 10 ≤x≤ 30 (mol%) are prepared by conventional melt quenching technique. The optical properties of sodium germanate (GN) glass system, including refractive index, dielectric constant, absorption coefficient and transmittance are measured at terahertz (THz) frequencies. High refractive index, n(THz) and high dielectric constant, ԑ(THz) of germanate glasses have been identified in the sub-terahertz region (0.2–1 THz). The wavelength-dependent refractive index, n(λ) has been analyzed with the ellipsometric analysis. The refractive index in the 1.52–1.65 range is obtained at the 550 nm wavelength for the present system. Optical properties are explained based on the structure investigated by Raman spectroscopy. Thermal stability factors are also examined with the differential thermal analysis (DTA) to relate the thermal and THz parameters for THz applications.

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光子应用中锗酸盐玻璃系统的太赫兹时域光谱和光学特性

本文研究了钠含量对锗酸盐玻璃的热、结构、椭偏和太赫兹性能的影响。采用常规熔体淬火法制备了成分为xNa2O.(100-x)GeO2，质量分数为10≤x≤30 （mol%）的锗酸钠玻璃。在太赫兹（THz）频率下测量了锗酸钠（GN）玻璃体系的折射率、介电常数、吸收系数和透射率等光学性能。在亚太赫兹区（0.2-1太赫兹）发现了高折射率n（THz）和高介电常数ԑ（THz）的锗酸盐玻璃。用椭偏分析方法分析了波长相关的折射率n（λ）。在550 nm波长处，得到了该体系在1.52 ~ 1.65范围内的折射率。利用拉曼光谱对其结构进行了分析，解释了其光学性质。热稳定性因素也通过差热分析（DTA）来检验，以将太赫兹应用的热参数和太赫兹参数联系起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.