用添加的玻璃中的偏磁点缺陷:E^{'}(F) 中心
Linards Skuja1, Madara Leimane1, Nadège Ollier2
1Institute of Solid State Physics, University of Latvia, Riga LV1063, Latvia.
Physical review letters
|January 5, 2024
概括
研究人员使用电子偏磁共振在光纤中发现了第一个与有关的缺陷. 这一发现确定了改性悬浮键,对于抗辐射光纤光学至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光学材料 光学材料
背景情况:
- 用添加的二氧化对于低损耗和耐辐射的光纤至关重要.
- 以前,在中没有发现特异性辐射诱导的点缺陷.
研究的目的:
- 为了识别和描述与相关的酸盐中的辐射诱导的点缺陷.
- 了解这些新缺陷的原子结构.
主要方法:
- 使用了电子磁共振 (EPR) 谱学.
- 对-19 (19F) 和-29 (29Si) 核的超细合 (hfc) 的分析.
主要成果:
- 首次直接观察到与有关的酸盐缺陷.
- 鉴定了一种具有特征的EPR信号,具有10.5mT分裂 (由于19F hfc).
- 对29Si的额外44.4mT hfc证实该缺陷属于E'中心家族.
结论:
- 发现的缺陷是改性悬挂键.
- 这种缺陷涉及一个3坐标的Si原子与sp3轨道中的一个未配对电子.
- 该结构通过两个桥梁氧原子和一个原子与网络结合.
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