Coupling Emitters and Silver Nanowires to Achieve Long-Range Plasmon-Mediated Fluorescence Energy Transfer
Coupling Emitters and Silver Nanowires to Achieve Long-Range Plasmon-Mediated Fluorescence Energy Transfer
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DOI：
10.1021/acsnano.6b00287
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发表时间：
2016-04-01
期刊：
影响因子：
17.1
通讯作者：
Wenger, Jerome
中科院分区：
文献类型：
--
作者：
de Torres, Juan;Ferrand, Patrick;Wenger, Jerome
量子等离子体电路的发展需要量子发射器和等离子体波导之间的有效耦合。一个主要的实验挑战是同时最大化的表面等离子体传播长度，到等离子体模式的耦合效率，和珀塞尔因子。解决这一挑战也是实现量子纳米发射体之间远程能量转移的关键。在这里，我们使用双光束扫描共聚焦显微镜仔细研究荧光纳米粒子和表面等离子体之间的相互作用单晶银纳米线。通过纳米线表面等离子体激元激发荧光纳米颗粒，我们最大限度地提高了光物质相互作用，耦合效率高达44%，寿命缩短24倍，传播长度为4.1 pm。这种改进的光学性能使得能够证明由微米距离分开的两个纳米颗粒之间的长程等离子体介导的荧光能量转移。我们的研究结果为集成等离子体激元和量子纳米光学提供了有效的远程荧光能量转移的实际实现指南。
The development of quantum plasmonic circuitry requires efficient coupling between quantum emitters and plasmonic waveguides. A major experimental challenge is to simultaneously maximize the surface plasmon propagation length, the coupling efficiency into the plasmonic mode, and the Purcell factor. Addressing this challenge is also the key to enabling long-range energy transfer between quantum nanoemitters. Here, we use a dual-beam scanning confocal microscope to carefully investigate the interactions between fluorescent nano particles and surface plasmons on single-crystalline silver nanowires. By exciting the fluorescent nanoparticles via nanowire surface plasmons, we maximize the light matter interactions and reach coupling efficiencies up to 44% together with 24x lifetime reduction and 4.1 pm propagation lengths. This improved optical performance enables the demonstration of long-range plasmon-mediated fluorescence energy transfer between two nanoparticles separated by micrometer distance. Our results provide guidelines toward practical realizations of efficient long-range fluorescence energy transfer for integrated plasmonics and quantum nano optics.