We theoretically present the selective remote-excitation of the gap mode in the silver nanowire-nanoparticle (Ag NW-NP) system based on the excitation of the ±1-order chiral surface plasmonic polaritons (SPPs) modes, which have the crescent-shaped transverse intensity distributions and the helical propagation traces. When the gap mode at junction between the Ag-NW and the Ag-NP is excited via the +1-order chiral SPPs mode, the −1-order chiral SPP mode cannot effectively excite the gap mode, because the propagation traces of the ±1-order spiral SPPs modes have complementary intensity distributions. This selective remote-excitation method may be used in the nanowire photonics and nano-optical spectroscopy.

中文翻译：

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使用手性表面等离子体激元选择性远程激发金属纳米线-纳米粒子系统中的间隙模式

我们在理论上提出了银纳米线-纳米粒子 (Ag NW-NP) 系统中间隙模式的选择性远程激发，该系统基于 ±1 阶手性表面等离子体极化子 (SPP) 模式的激发，其具有新月形横向强度分布和螺旋传播轨迹。当 Ag-NW 和 Ag-NP 结处的间隙模式通过 +1 级手性 SPPs 模式激发时，-1 级手性 SPP 模式不能有效地激发间隙模式，因为 ±一阶螺旋 SPP 模式具有互补的强度分布。这种选择性远程激发方法可用于纳米线光子学和纳米光学光谱学。