McCloskey Daniel J, Dontschuk Nikolai, Broadway David A, Nadarajah Athavan, Stacey Alastair, Tetienne Jean-Philippe, Hollenberg Lloyd C L, Prawer Steven, Simpson David A
School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia.
Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia.
ACS Appl Mater Interfaces. 2020 Mar 18;12(11):13421-13427. doi: 10.1021/acsami.9b19397. Epub 2020 Mar 6.
Surface micro- and nano-patterning techniques are often employed to enhance the optical interface to single photoluminescent emitters in diamond, but the utility of such surface structuring in applications requiring ensembles of emitters is still open to investigation. Here, we demonstrate scalable and fault-tolerant fabrication of closely packed arrays of fluorescent diamond nanopillars, each hosting its own dense, uniformly bright ensemble of near-surface nitrogen-vacancy centers. We explore the optimal sizes for these structures and realize enhanced spin and photoluminescence properties resulting in a 4.5 times increase in optically detected magnetic resonance sensitivity when compared to unpatterned surfaces. Utilizing the increased measurement sensitivity, we image the mechanical stress tensor in each diamond pillar across the arrays and show that the fabrication process has a negligible impact on in-built stress compared to the unpatterned surface. Our results represent a valuable pathway toward future multimodal and vector-resolved imaging studies, for instance in biological contexts.
表面微纳图案化技术常用于增强与金刚石中单个光致发光发射体的光学界面，但这种表面结构化在需要发射体集合的应用中的效用仍有待研究。在此，我们展示了荧光金刚石纳米柱紧密排列阵列的可扩展且容错的制造方法，每个纳米柱都包含其自身密集、均匀明亮的近表面氮空位中心集合。我们探索了这些结构的最佳尺寸，并实现了增强的自旋和光致发光特性，与未图案化的表面相比，光学检测磁共振灵敏度提高了4.5倍。利用提高的测量灵敏度，我们对整个阵列中每个金刚石柱的机械应力张量进行成像，并表明与未图案化的表面相比，制造过程对内置应力的影响可忽略不计。我们的结果为未来的多模态和矢量分辨成像研究提供了一条有价值的途径，例如在生物环境中。
