Tip-enhanced strong coupling spectroscopy, imaging, and control of a single quantum emitter
Tip-enhanced strong coupling spectroscopy, imaging, and control of a single quantum emitter
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DOI：
10.1126/sciadv.aav5931
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发表时间：
2019-07-01
期刊：
影响因子：
13.6
通讯作者：
Raschke, Markus B.
中科院分区：
文献类型：
--
作者：
Park, Kyoung-Duck;May, Molly A.;Raschke, Markus B.
光学腔可以增强和控制光与物质的相互作用。这种控制水平最近已经扩展到纳米级，即使在室温下使用等离子体纳米结构也具有单发射极强耦合。然而，静态几何形状的发射器限制了调谐耦合强度或将不同发射器耦合到同一腔的能力。在这里，我们提出了尖端增强强耦合（TESC）与扫描等离子体天线尖端和基板之间形成的纳米腔。通过可逆地和动态地寻址单量子点，我们观察到模式分裂高达160毫电子伏和anticrossing在类似于100毫电子伏的失谐范围内，并与亚纳米精度超过深亚衍射极限模式体积。因此，TESC能够基于近场显微镜对发射极-纳米腔耦合和模体积进行先前无法实现的控制。这开辟了诱导，探测和控制单发射等离子体混合量子态的途径，用于室温下从光电子学到量子信息科学的应用。
Optical cavities can enhance and control light-matter interactions. This level of control has recently been extended to the nanoscale with single emitter strong coupling even at room temperature using plasmonic nanostructures. However, emitters in static geometries, limit the ability to tune the coupling strength or to couple different emitters to the same cavity. Here, we present tip-enhanced strong coupling (TESC) with a nanocavity formed between a scanning plasmonic antenna tip and the substrate. By reversibly and dynamically addressing single quantum dots, we observe mode splitting up to 160 meV and anticrossing over a detuning range of similar to 100 meV, and with subnanometer precision over the deep subdiffraction-limited mode volume. Thus, TESC enables previously inaccessible control over emitter-nanocavity coupling and mode volume based on near-field microscopy. This opens pathways to induce, probe, and control single-emitter plasmon hybrid quantum states for applications from optoelectronics to quantum information science at room temperature.