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Oblique launching of optical surface waves by a subwavelength slit

机译:亚波长狭缝斜向发射光学表面波

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The electromagnetic field on the metal surface launched by a subwavelength slit is analytically studied for the case when the fundamental mode inside the slit has a wave-vector component along the slit axis (conical mount). Both near-field and far-field regions are discussed, and the role of surface plasmon-polaritons and Norton waves is revealed. It is shown that the distance from the slit at which Norton waves are more intense than surface plasmons decreases with the parallel wave vector. Additionally, it is found that the s-polarization component, while present for any nonzero parallel wave vector, only weakly contributes to the Norton waves.
机译:对于狭缝内部的基本模式沿狭缝轴(圆锥形安装座)具有波矢量分量的情况,对由亚波长狭缝发射的金属表面上的电磁场进行了分析研究。讨论了近场和远场区域,并揭示了表面等离子体激元-极化子和诺顿波的作用。结果表明,与平行波矢量相比,距诺顿波比表面等离子体激元更强的缝隙的距离减小。此外,发现尽管存在于任何非零平行波矢量中,但s极化分量对诺顿波的贡献很小。

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