材料科学
光学
表面等离子体激元
等离子体子
飞秒
光电子学
多路复用器
极化(电化学)
表面等离子体子
圆极化
激光器
多路复用
物理
微带线
电信
物理化学
化学
计算机科学
作者
Zhenlong Zhao,Boyu Ji,Guiqi Wang,Yulu Qin,Xiaowei Song,Jingquan Lin
摘要
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.
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