Theoretical and experimental investigation of strongly localized plasmons on triangular metal wedges for subwavelength waveguiding
Theoretical and experimental investigation of strongly localized plasmons on triangular metal wedges for subwavelength waveguiding
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DOI：
10.1063/1.1991990
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发表时间：
2005-08-08
影响因子：
4
通讯作者：
Matsuo, S
中科院分区：
文献类型：
--
作者：
Pile, DFP;Ogawa, T;Matsuo, S
我们报道了由三角形金属楔引导的强局域等离激元的数值分析和实验观测结果。利用时域有限差分算法分析了这种楔等离激元的色散和耗散。通过对40度银纳米楔上预测的等离激元进行端射激发和近场探测来进行实验观测。实验结果与理论预测的传播距离吻合良好。近场光学探针分辨率不足解释了理论和实验场分布之间的差异。（c）2005美国物理学会
We report numerical analysis and experimental observation of strongly localized plasmons guided by a triangular metal wedge. Dispersion and dissipation of such wedge plasmons are analyzed using the finite-difference time-domain algorithm. Experimental observation is conducted by the end-fire excitation and near-field detection of the predicted plasmons on a 40 degrees silver nanowedge. Good agreement with the theoretically predicted propagation distances is demonstrated. Differences between the theoretical and experimental field distribution are explained by insufficient resolution of the near-field optical probe. (c) 2005 American Institute of Physics.