由狭缝宽度操控的等离子体和光子模式的干涉图样。

The Interference Pattern of Plasmonic and Photonic Modes Manipulated by Slit Width.

作者信息

Li Xing, Tang Jing, Zhang Xuelian, Zhang Ruirui, Zeng Xiangyu, Zhan Zijun, Liu Chunxiang, Cheng Chuanfu

机构信息

Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, College of Physics and Electronics, Shandong Normal University, Jinan 250014, China.

出版信息

Nanomaterials (Basel). 2020 Apr 11;10(4):730. doi: 10.3390/nano10040730.

DOI:10.3390/nano10040730

PMID:32290409

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7221913/

Abstract

We demonstrate that the interference pattern of the plasmonic and photonic modes can be controlled by changing the slit width of a square slit structure. Based on the analyses of the plasmonic and photonic modes of slits with different widths, we theoretically derived the expressions of wavefield generated by a square slit. A far-field scattered imaging system is utilized to collect the intensity distribution experimentally. Various interference patterns, including stripes, square-like lattice array, and diamond-like lattice array, have been observed by adjusting the slit widths. In addition, the results were validated by performing finite-difference time-domain simulations, which are consistent with the theoretical and experimental results.

摘要

我们证明，通过改变方形狭缝结构的狭缝宽度，可以控制等离子体模式和光子模式的干涉图样。基于对不同宽度狭缝的等离子体模式和光子模式的分析，我们从理论上推导了方形狭缝产生的波场表达式。利用远场散射成像系统通过实验收集强度分布。通过调整狭缝宽度，观察到了各种干涉图样，包括条纹、类方形晶格阵列和类菱形晶格阵列。此外，通过进行时域有限差分模拟对结果进行了验证，模拟结果与理论和实验结果一致。