Influence of structural defects on the spectral characteristics of Er3+ impurities in Y2SiO5 crystals

IF 1.7 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

The European Physical Journal B Pub Date : 2025-10-17 DOI:10.1140/epjb/s10051-025-01068-0

I. Nuritdinov, Z. U. Esanov, Kh. M. Majidov, F. K. Khallokov, N. M. Kilichov

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Abstract

This study investigates the influence of gamma irradiation (up to 10⁸ rad) and subsequent thermal annealing (700 °C, up to 9 h) on the spectral characteristics of Y₂SiO₅:Er³⁺ crystals. It has been established that these treatments induce the formation of oxygen vacancies in the crystal, leading to coordination transformations from Er1 to Er2 sites. This is accompanied by a redistribution of the intensities of f–f transitions, which enabled the spectroscopic identification and differentiation of two types of Er³⁺ centers with distinct coordination environments. Induced absorption and luminescence bands associated with the formation of F and F⁺ centers were observed. It was demonstrated that changes in the local crystal field surrounding the Er³⁺ ions lead to noticeable Stark splitting, as evident in both absorption and photoluminescence spectra. The results demonstrate the potential for controlled modification of the material’s optical properties via coordination rearrangement, which is of interest for photonic and quantum technologies.

Graphic abstract

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Y2SiO5晶体中结构缺陷对Er3+杂质光谱特性的影响

本研究研究了伽马辐射（高达10⁸rad）和随后的热退火（700℃，长达9小时）对Y₂SiO₅：Er3⁺晶体光谱特性的影响。这些处理诱导了晶体中氧空位的形成，导致Er1位到Er2位的配位转变。这伴随着f-f跃迁强度的重新分布，这使得具有不同协调环境的两种Er3⁺中心的光谱识别和区分成为可能。观察到与F +和F +中心形成相关的诱导吸收和发光带。结果表明，Er3 +离子周围局部晶体场的变化导致了明显的Stark分裂，这在吸收光谱和光致发光光谱中都很明显。结果表明，通过配位重排对材料光学性质进行可控修饰的潜力，这是光子和量子技术的兴趣所在。图形抽象

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