Plasmonic Nanodiamonds

作者：Le Liang, Peng Zheng, Sisi Jia, Krishanu Ray, Yun Chen, Ishan Barman · 发表于：Nano Letters · 年份：2023 · DOI：10.1021/acs.nanolett.3c01514 · 被引用次数：20 · 研究领域：Diamond and Carbon-based Materials Research、Advanced Fiber Laser Technologies、Nonlinear Optical Materials Studies

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.