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arXiv 1209.2808cond-mat.mes-hallphysics.optics
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等离子体激元纳米线模的阻尼诱导相位翻转分析

Analysis of damping-induced phase flips of plasmonic nanowire modes

Andreas Hohenau, Primoz Kusar, Christian Gruber, Joachim R. Krenn

摘要:

我们从银纳米线的一端发射表面等离子体激元通过不对称照明与白光和使用等离子体激元到光散射在纳米线两端探测光谱的等离子体激元法布里-珀罗线模式。从纳米线两端的散射强度的最大值和最小值的光谱位置被发现是同相或异相,这取决于纳米线的长度和光谱范围。这一现象可以用广义Fabry-Perot模型来解释。这两个制度之间的转折点是敏感的表面等离子体往返损耗,从而打开了一个新的可能性,用于检测纳米线环境中的光吸收的变化。

英文摘要:

We launch surface plasmons from one end of a silver nanowire by asymmetric illumination with white light and use plasmon-to-light scattering at the nanowire ends to probe spectroscopically the plasmonic Fabry-Perot wire modes. The spectral positions of the maxima and minima in the scattered intensity from both nanowire ends are found to be either in phase or out-of phase, depending on the nanowire length and the spectral range. This behavior can be explained by a generalized Fabry-Perot model. The turnover-point between the two regimes is sensitive to the surface plasmon round trip losses and thus opens a new possibility for detecting changes of the optical absorption in the nanowire environment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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