QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany.
Phys Rev Lett. 2019 Sep 6;123(10):106802. doi: 10.1103/PhysRevLett.123.106802.
Single dopant atoms or dopant-related defect centers in a solid state matrix are of particular importance among the physical systems proposed for quantum computing and communication, due to their potential to realize a scalable architecture compatible with electronic and photonic integrated circuits. Here, using a deterministic source of single laser-cooled Pr^{+} ions, we present the fabrication of arrays of praseodymium color centers in yttrium-aluminum-garnet substrates. The beam of single Pr^{+} ions is extracted from a Paul trap and focused down to 30(9) nm. Using a confocal microscope, we determine a conversion yield into active color centers of up to 50% and realize a placement precision of 34 nm.
在用于量子计算和通信的物理系统中，由于其有可能实现与电子和光子集成电路兼容的可扩展架构，因此在固态基质中单个掺杂原子或与掺杂相关的缺陷中心受到了特别关注。在这里，我们使用单激光冷却的 Pr^{+}离子的确定性源，在钇铝石榴石衬底中制备了一系列镨色心。从保罗阱中提取出单 Pr^{+}离子束，并聚焦到 30(9)nm。通过共聚焦显微镜，我们确定了高达 50%的活性色心的转换效率，并实现了 34nm 的放置精度。
