Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, National Engineering Research Center of Optical Instrumentation, JORCEP, College of Optical Science and Engineering, Zhejiang University, 310058, Hangzhou, China.
Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006, Guangzhou, China.
Nat Commun. 2018 Apr 27;9(1):1705. doi: 10.1038/s41467-018-04077-z.
Plasmon-emitter hybrid nanocavity systems exhibit strong plasmon-exciton interactions at the single-emitter level, showing great potential as testbeds and building blocks for quantum optics and informatics. However, reported experiments involve only one addressable emitting site, which limits their relevance for many fundamental questions and devices involving interactions among emitters. Here we open up this critical degree of freedom by demonstrating selective far-field excitation and detection of two coupled quantum dot emitters in a U-shaped gold nanostructure. The gold nanostructure functions as a nanocavity to enhance emitter interactions and a nanoantenna to make the emitters selectively excitable and detectable. When we selectively excite or detect either emitter, we observe photon emission predominantly from the target emitter with up to 132-fold Purcell-enhanced emission rate, indicating individual addressability and strong plasmon-exciton interactions. Our work represents a step towards a broad class of plasmonic devices that will enable faster, more compact optics, communication and computation.
等离子体-发射器混合纳米腔系统在单发射器水平上表现出很强的等离子体-激子相互作用，作为量子光学和信息学的测试平台和构建模块具有很大的潜力。然而，已报道的实验仅涉及一个可寻址的发射点，这限制了它们在许多涉及发射器相互作用的基本问题和器件中的相关性。在这里，我们通过演示在 U 形金纳米结构中两个耦合量子点发射器的选择性远场激发和探测，开辟了这一关键自由度。金纳米结构作为纳米腔来增强发射器相互作用，作为纳米天线来使发射器具有选择性可激发性和可探测性。当我们选择性地激发或探测任一发射器时，我们观察到光子发射主要来自目标发射器，其Purcell 增强发射率高达 132 倍，表明了单个可寻址性和强等离子体-激子相互作用。我们的工作代表了迈向一类广泛的等离子体器件的重要一步，这些器件将实现更快、更紧凑的光学、通信和计算。
Zotero 插件
