The finite-difference time-domain method was employed to simulate the propagation of a pulse-modulated surface-plasmon-polariton (SPP) wave along a planar silicon/silver interface in the near-infrared spectral regime. The signal energy on the silicon side varies with the carrier frequency, decreases with the propagation distance, and fans away from the interface as the propagation distance increases. Yet a large fraction of the signal energy on the silicon side is confined to within 250 nm of the interface even for a propagation distance of 800 nm.

中文翻译：

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由平面硅/银界面引导的脉冲调制表面等离子体极化波的定位

采用有限差分时域方法来模拟脉冲调制表面等离子体激元 (SPP) 波在近红外光谱范围内沿平面硅/银界面的传播。硅侧的信号能量随着载波频率的变化而变化，随着传播距离的增加而减小，随着传播距离的增加而远离界面。然而，即使传播距离为 800 nm，硅侧的大部分信号能量也被限制在界面的 250 nm 以内。