Abstract：
While nitrogen-vacancy (NV) centers in diamonds have emerged as promising solid-state quantum emitters for sensing applications, the tantalizing possibility of coupling them with photonic or broadband plasmonic nanostructures to create ultrasensitive biolabels has not been fully realized. Indeed, it remains technologically challenging to create free-standing hybrid diamond-based imaging nanoprobes with enhanced brightness and high temporal resolution. Herein, we leverage the bottom-up DNA self-assembly to develop hybrid free-standing plasmonic nanodiamonds, which feature a closed plasmonic nanocavity completely encapsulating a single nanodiamond. Correlated single nanoparticle spectroscopical characterizations suggest that the plasmonic nanodiamond displays dramatically and simultaneously enhanced brightness and emission rate. We believe that they hold huge potential to serve as a stable solid-state single-photon source and could serve as a versatile platform to study nontrivial quantum effects in biological systems with enhanced spatial and temporal resolution.
摘要：
虽然钻石中的氮空位（NV）中心已经成为有希望用于传感应用的固态量子发射器，将它们与光子或宽带等离子体纳米结构耦合以创建超灵敏的生物标签的诱人可能性尚未完全实现。的确,创建具有增强亮度和高时间分辨率的独立式混合金刚石成像纳米探针在技术上仍然具有挑战性。在这里，我们利用自下而上的DNA自组装来开发混合的自由等离子体纳米金刚石，其特征是完全封装单个纳米金刚石的封闭等离子体纳米腔。相关的单纳米颗粒光谱特征表明等离子体纳米金刚石显示出显著且同时增强的亮度和发射速率。我们相信，它们具有作为稳定的固态单光子源的巨大潜力，并且可以作为一个多功能平台，以增强的空间和时间分辨率研究生物系统中的非平凡量子效应。
