Adiabatic bends in surface plasmon polariton band gap structures.
Adiabatic bends in surface plasmon polariton band gap structures.
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DOI：
10.1364/oe.14.004107
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发表时间：
2006-05
期刊：
影响因子：
3.8
通讯作者：
I. Radko;T. Søndergaard;S. Bozhevolnyi
中科院分区：
文献类型：
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作者：
I. Radko;T. Søndergaard;S. Bozhevolnyi
使用收集近场显微镜研究了在 700-860 nm 波长范围内激发的表面等离子体激元 (SPP) 与放置在金膜表面上的金凸块周期性三角形阵列的传播和相互作用。我们观察到在一定波长范围内 SPP 传播到阵列中的抑制，即带隙 (BG) 效应。我们还演示了通过周期性散射体阵列的绝热旋转获得的沿 30 度弯曲通道的 SPP 传播。提出了使用李普曼-施温格积分方程方法的数值模拟，并发现与实验结果相当一致。
Propagation and interaction of surface plasmon polaritons (SPPs) excited in the wavelength range 700-860 nm with periodic triangular arrays of gold bumps placed on gold film surfaces are investigated using a collection near-field microscope. We observe the inhibition of SPP propagation into the arrays within a certain wavelength range, i.e., the band gap (BG) effect. We demonstrate also the SPP propagation along a 30 degrees bent channel obtained by an adiabatic rotation of the periodic array of scatterers. Numerical simulations using the Lippmann-Schwinger integral equation method are presented and found in reasonable agreement with the experimental results.