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Effect of grating period on the excitation of multiple surface-plasmon-polariton waves guided by the interface of a metal grating and a photonic crystal

机译:光栅周期对金属光栅与光子晶体界面引导的多个表面等离子体激元波激发的影响

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摘要

The excitation of multiple surface-plasmon-polariton (SPP) waves guided by the interface of a metal and a one-dimensional photonic crystal in the grating-coupled configuration was studied both experimentally and theoretically. Only p-polarized incident light was considered in the visible and near-infrared regimes. When the absorptance was plotted against the angle of incidence, the excitation of an SPP wave was indicated by an absorptance peak whose angular location did not change with the number of periods (beyond a threshold) of the photonic crystal. A decrease in the period of the metal grating resulted in shifting the excitation of the SPP waves to smaller wavelengths.
机译:通过实验和理论研究了由金属和一维光子晶体的界面引导的多表面等离子体激元(SPP)波的激发。在可见光和近红外区域中仅考虑了p偏振入射光。当绘制吸收率与入射角的关系曲线时,SPP波的激发由吸收率峰表示,该吸收率峰的角位置不随光子晶体的周期数(超过阈值)而变化。金属光栅周期的减小导致将SPP波的激发移到较小的波长。

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