通过调整激发光的空间频率动态调制等离子体场。

Dynamically Modulating Plasmonic Field by Tuning the Spatial Frequency of Excitation Light.

作者信息

Wang Sen, Sun Minghua, Wang Shanqin, Fu Maixia, He Jingwen, Li Xing

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.

Key Laboratory of Grain Information Processing and Control, College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China.

出版信息

Nanomaterials (Basel). 2020 Jul 24;10(8):1449. doi: 10.3390/nano10081449.

DOI:10.3390/nano10081449

PMID:32722189

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7466275/

Abstract

Based on the Fourier transform (FT) of surface plasmon polaritons (SPPs), the relation between the displacement of the plasmonic field and the spatial frequency of the excitation light is theoretically established. The SPPs' field shifts transversally or longitudinally when the spatial frequency components f x or f y are correspondingly changed. The SPPs' focus and vortex field can be precisely located at the desired position by choosing the appropriate spatial frequency. Simulation results are in good agreement with the theoretical analyses. Dynamically tailoring the plasmonic field based on the spatial frequency modulation can find potential applications in microparticle manipulation and angular multiplexed SPP focusing and propagation.

摘要

基于表面等离激元极化激元（SPPs）的傅里叶变换（FT），从理论上建立了等离激元场位移与激发光空间频率之间的关系。当空间频率分量fx或fy相应变化时，表面等离激元极化激元（SPPs）的场会横向或纵向移动。通过选择合适的空间频率，可以将表面等离激元极化激元（SPPs）的焦点和涡旋场精确地定位在所需位置。模拟结果与理论分析吻合良好。基于空间频率调制动态调控等离激元场在微粒操控以及角复用表面等离激元极化激元（SPPs）聚焦与传播方面具有潜在应用。