Symmetrical double-groove structure as a broadband plasmonic polarization multiplexer
Symmetrical double-groove structure as a broadband plasmonic polarization multiplexer
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DOI：
10.1364/ome.428035
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发表时间：
2021-09
影响因子：
2.8
通讯作者：
Zhen-Ming Zhao;B. Ji;Guiqi Wang;Yulu Qin;Xiao-wei Song;Jingquan Lin
中科院分区：
文献类型：
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作者：
Zhen-Ming Zhao;B. Ji;Guiqi Wang;Yulu Qin;Xiao-wei Song;Jingquan Lin
等离子体激元偏振复用器对于发展宽带高速等离子体激元互连变得越来越重要。在这里，我们证明了对称的双槽结构可以作为一个偏振复用器的宽带飞秒表面等离子体激元（SPP）的模式分布与光电子显微镜（PEEM）的调查。实验结果表明，当用p偏振光激发时，双槽结构激发的SPPs场的模式分布是对称的，而当用s偏振光激发时，该模式呈现反对称的场分布，为交错的人字形。此外，当用左手或右手圆形飞秒激光脉冲激发双槽时，表面等离子体产生的场分布呈现出不对称模式。所得到的PEEM图像支持FDTD模拟。建议的多路复用器是一个很有前途的高度集成的光电集成电路的构建块。
Plasmonic polarization multiplexers are becoming increasingly significant for the development of high-speed plasmonic interconnection with broad bandwidth. Here, we demonstrate that the symmetrical double-groove structure can act as a polarization multiplexer for broadband femtosecond surface plasmon polaritons (SPPs) by investigating the mode distributions with photoemission electron microscopy (PEEM). Experimental results show that the mode distribution of the SPPs field from the excitation of the double-groove structure is symmetrical when irradiated with p-polarized light, whereas the mode shows an anti-symmetric field distribution as a staggered, herringbone shape with s-polarized light excitation. Furthermore, the SPPs field distribution shows an asymmetrical mode when the double-groove is excited with a left or right-handed circular femtosecond laser pulse. The resulting PEEM images are supported by FDTD simulations. The proposed multiplexer is a promising building block for highly integrated optoelectronic integrated circuits.