标题： 微米薄膜中稀土自旋的相干性特性 显示英文标题

标题： Coherence Properties of Rare-Earth Spins in Micrometer-Thin Films

摘要： 稀土离子在块状晶体中是量子信息科学中出色的固态量子系统，这得益于其卓越的光学和自旋相干特性。 然而，单个稀土离子的弱荧光给可扩展性带来了重大挑战，需要将其集成到微腔中。 薄膜作为一种有前途的材料平台用于集成，但不损害材料和稀土离子特性的制造仍然具有挑战性。 在这项工作中，我们使用离子注入技术从块状晶体中制造出微米厚的钇铝石榴石（YAG）薄膜。 所得的薄膜保留了原始块状晶体的单晶结构。 值得注意的是，嵌入的稀土离子具有光稳定性，并表现出类似块状晶体的自旋相干特性。 我们的结果展示了类似块状晶体的自旋特性与薄膜制造技术的兼容性，促进了稀土离子在片上光子器件中的高效集成，并推动了稀土离子系统在量子技术中的应用。 显示英文摘要

摘要： Rare-earth ions in bulk crystals are excellent solid-state quantum systems in quantum information science, owing to the exceptional optical and spin coherence properties. However, the weak fluorescence of single rare-earth ions present a significant challenge for scalability, necessitating the integration into micro-cavities. Thin films serve as a promising material platform for the integration, yet the fabrication without compromising the properties of the materials and rare-earth ions remains challenging. In this work, we fabricate micrometer-thin yttrium aluminum garnet (YAG) films from bulk crystals using ion implantation techniques. The resulting films preserve the single-crystalline structure of the original bulk crystal. Notably, the embedded rare-earth ions are photo-stable and exhibit bulk-like spin coherence properties. Our results demonstrate the compatibility of bulk-like spin properties with the thin-film fabrication technique, facilitating the efficient integration of rare-earth ions into on-chip photonic devices and advancing the applications of rare-earth ions systems in quantum technologies.