Ultrafast Plasmon Propagation in Nanowires Characterized by Far-Field Spectral Interferometry
Ultrafast Plasmon Propagation in Nanowires Characterized by Far-Field Spectral Interferometry
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DOI：
10.1021/nl202864n
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发表时间：
2012-01-01
期刊：
影响因子：
10.8
通讯作者：
Brixner, Tobias
中科院分区：
文献类型：
--
作者：
Rewitz, Christian;Keitzl, Thomas;Brixner, Tobias
采用光谱干涉测量法来全面表征以超短脉冲形式通过银纳米线传输的传播等离子体的振幅和相位。根据绝热聚焦理论，对于直径低于 100 nm 的纳米线，等离子体激元群速度会急剧下降。此外，还证明了等离子体激元群速度对局部纳米线环境的依赖性。我们的研究结果与纳米等离子体信号处理的设计和实现以及相干控制应用相关。
Spectral interferometry is employed to fully characterize amplitude and phase of propagating plasmons that are transmitted through silver nanowires in the form of ultrashort pulses. For nanowire diameters below 100 nm, the plasmon group velocity is found to decrease drastically in accordance with the theory of adiabatic focusing. Furthermore, the dependence of the plasmon group velocity on the local nanowire environment is demonstrated. Our findings are of relevance for the design and implementation of nanoplasmonic signal processing and in view of coherent control applications.