Influence of the tip in near-field imaging of nanoparticle plasmonic modes: Weak and strong coupling regimes
Influence of the tip in near-field imaging of nanoparticle plasmonic modes: Weak and strong coupling regimes
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DOI：
10.1103/physrevb.79.125439
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发表时间：
2009-03-01
影响因子：
3.7
通讯作者：
Aizpurua, Javier
中科院分区：
文献类型：
--
作者：
Garcia-Etxarri, Aitzol;Romero, Isabel;Aizpurua, Javier
我们用散射型扫描近场光学显微镜对等离子体共振金纳米盘成像来识别近场探测针尖和等离子体样品之间的弱耦合和强耦合。通过基于模型系统的严格电动力学计算，我们发现在弱耦合区，S-单模光学显微镜可用于等离子体纳米天线模式的直接映射，而在强耦合区，近场探头允许高精度的光机械控制天线的响应。
We identify weak and strong coupling regimes between a near-field probing tip and a plasmonic sample by imaging plasmon-resonant gold nanodisks with scattering-type scanning near-field optical microscopy (s-SNOM). By means of rigorous electrodynamical calculations based on a model system, we find that in the weak coupling regime, s-SNOM can be applied for direct mapping of plasmonic nanoantenna modes, while in the strong coupling regime, the near-field probe allows for high-precision opto-mechanical control of the antenna response.