Abstract The fluorescence spectra of probe Cr3+ centers in MgAl2O4 spinel nanolayers of different thickness grown on SrTiO3 substrates were studied. The films were produced by laser molecular beam epitaxy. The fluorescence spectra strongly depend on nanofilm growth conditions. The Cr3+ ions 2E excited state lifetime was found to significantly differ from that in the bulk crystals. The role of Mg/Al inversion in the spinel lattice in the fluorescent properties is discussed.

中文翻译：

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SrTiO3衬底上MgAl2O4外延纳米尖晶石薄膜中Cr3+离子的荧光

摘要 研究了生长在SrTiO3基底上的不同厚度MgAl2O4尖晶石纳米层中Cr3+探针中心的荧光光谱。这些薄膜是通过激光分子束外延生产的。荧光光谱强烈依赖于纳米膜生长条件。发现 Cr3+ 离子 2E 激发态寿命与块状晶体中的显着不同。讨论了镁/铝反转在尖晶石晶格中的荧光特性中的作用。