Observation of plasmon propagation, redirection, and fan-out in silver nanowires
Observation of plasmon propagation, redirection, and fan-out in silver nanowires
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DOI：
10.1021/nl052471v
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发表时间：
2006-08-09
期刊：
影响因子：
10.8
通讯作者：
Reed, Mark A.
中科院分区：
文献类型：
--
作者：
Sanders, Aric W.;Routenberg, David A.;Reed, Mark A.
我们报告的自由空间光子（真空波长为830 nm）的银纳米线的表面等离子体激元模式的耦合。传播等离子体激元的发射以及随后的光子发射是选择性的，并且仅发生在纳米线的末端和其他不连续处。此外，我们观察到纳米线通过半径小至4 μ m的转弯重新引导等离子体振子。我们利用辐射性质的不连续性，找到一个等离子体传播长度> 3 +/- 1 μ m。最后，我们观察到，线间等离子体耦合发生重叠的电线，演示等离子体扇出在亚波长尺度。
We report the coupling of free-space photons (vacuum wavelength of 830 nm) to surface plasmon modes of a silver nanowire. The launch of propagating plasmons, and the subsequent emission of photons, is selective and occurs only at ends and other discontinuities of the nanowire. In addition, we observe that the nanowires redirect the plasmons through turns of radii as small as 4 mu m. We exploit the radiating nature of discontinuities to find a plasmon propagation length > 3 +/- 1 mu m. Finally, we observe that interwire plasmon coupling occurs for overlapping wires, demonstrating plasmon fan-out at subwavelength scales.