等离激元塔尔博特效应的实验研究。

An experimental study of the plasmonic Talbot effect.

作者信息

Zhang Weiwei, Zhao Chenlong, Wang Jiayuan, Zhang Jiasen

机构信息

State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University, Beijing 100871, PR China.

出版信息

Opt Express. 2009 Oct 26;17(22):19757-62. doi: 10.1364/OE.17.019757.

DOI:10.1364/OE.17.019757

PMID:19997196

Abstract

The Talbot effect of the surface plasmon polaritons (SPPs) using SPP launching gratings is studied experimentally. Talbot carpets are obtained and the Talbot distance is given when the paraxial approximation is not satisfied. Multi-layer and multi-level-phase launching gratings are designed to enhance the intensities of the amplitude-modulated revivals. Effective focusing of SPPs with multiple focal spots and a subwavelength full width at half maximum is obtained by using a three-layer four-level-phase launching grating.

摘要

利用表面等离激元极化激元（SPP）发射光栅对表面等离激元极化激元的塔尔博特效应进行了实验研究。在不满足傍轴近似的情况下获得了塔尔博特光场分布并给出了塔尔博特距离。设计了多层和多级相位发射光栅以增强幅度调制复苏的强度。通过使用三层四级相位发射光栅实现了表面等离激元极化激元的有效聚焦，其具有多个焦点且半高宽为亚波长。