Imaging of terahertz surface plasmon waves excited on a gold surface by a focused beam.
Imaging of terahertz surface plasmon waves excited on a gold surface by a focused beam.
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DOI：
10.1364/oe.19.003212
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发表时间：
2011-02
期刊：
影响因子：
3.8
通讯作者：
R. Mueckstein;O. Mitrofanov
中科院分区：
文献类型：
--
作者：
R. Mueckstein;O. Mitrofanov
利用集成亚波长孔径太赫兹近场探测器探测金属表面上紧聚焦太赫兹光束附近形成的表面等离子体激元（SPP）波。该探头可以绘制SPP波的电场图案并跟踪从焦斑中心开始的SPP传播。所观察到的波的SPP性质证实了时间分辨测量。分析所检测到的图案导致解释如何太赫兹SPP波可以检测到的集成的亚波长孔径探头。
Surface plasmon polariton (SPP) waves formed near a tightly focused THz beam on a metallic surface are detected by an integrated sub-wavelength aperture THz near-field probe. The probe allows mapping the electric field pattern of the SPP wave and tracking the SPP propagation from the center of the focal spot. The SPP nature of the observed wave is confirmed by time-resolved measurements. Analysis of the detected patterns leads to an explanation of how THz SPP waves can be detected by the integrated sub-wavelength aperture probe.