论文标题
跟踪具有单分子超分辨率成像的单个发射器与等离子纳米antennas的耦合
Tracking the Coupling of Single Emitters to Plasmonic Nanoantennas with Single-Molecule Super-Resolution Imaging
论文作者
论文摘要
金属纳米antennas可以通过将光限制为很小的体积来操纵光发射和检测。因此，与这些等离子结构相连的发射器是量子信息技术使用的理想候选者。但是，由于所涉及的系统尺寸，将量子发射器放置在纳米腔中的量子发射器一直具有挑战性。在这里，我们通过使用单分子超分辨率成像和跟踪来研究通过光梯度将单个发射器捕获动力学进入纳米腔。我们表明，与距离结构更远的分子相比，被困在Bowtie天线纳米胶片中的分子具有增加的光稳定性和轨道长度。对于共振天线，由于具有更强的光学诱捕效应，这些效果与异恢复性情况相比被放大。这些结果为使用等离子体光学诱捕以可靠的单一发射器与单个纳米ant纳斯的方式提供了开辟道路，从而可以进一步研究这些耦合系统。
Metal nanoantennas enable the manipulation of light emission and detection at the single photon level by confining light into very small volumes. Emitters coupled to these plasmonic structures are thus ideal candidates for usage in quantum information technology. However, controllably and reproducibly placing quantum emitters into nanocavities has been challenging due to the sizes of the systems involved. Here, we investigate the trapping dynamics of single emitters into nanocavities via optical gradient forces by using single-molecule super-resolution imaging and tracking. We show that molecules trapped in the nanogaps of bowtie antennas have increased photostability and track lengths compared to molecules farther away from the structure. For resonant antennas, these effects are magnified compared to the off-resonant case due to stronger optical trapping effects. These results open the way to using plasmonic optical trapping to reliably couple single emitters to single nanoantennas, enabling further studies of these coupled systems.
