通过亚波长狭缝阵列实现的高分辨率二维表面等离子体扇形输出

High-resolution 2D plasmonic fan-out realized by subwavelength slit arrays.

作者信息

Wang Qian, Bu Jing, Yuan X-C

机构信息

School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore.

出版信息

Opt Express. 2010 Feb 1;18(3):2662-7. doi: 10.1364/OE.18.002662.

DOI:10.1364/OE.18.002662

PMID:20174096

Abstract

The authors demonstrate a two dimensional (2D) plasmonic fan-out spot array by using subwavelength sized slit arrays. Near field scanning optical microscope (NSOM) is employed to examine intensity distributions of the generated fan-out plasmonic spots, showing good agreement with finite-difference time-domain (FDTD) simulation results. The plasmonic fan-out spots with full width half-maximum (FWHM) of 0.34 lambda(0) are optimized by various design parameters associated with the subwavelength slit as well as polarization states.

摘要

作者通过使用亚波长尺寸的狭缝阵列展示了一种二维（2D）等离子体扇出光斑阵列。采用近场扫描光学显微镜（NSOM）来检测所产生的扇出等离子体光斑的强度分布，结果表明与时域有限差分（FDTD）模拟结果吻合良好。通过与亚波长狭缝以及偏振态相关的各种设计参数，对半高宽（FWHM）为0.34λ₀的等离子体扇出光斑进行了优化。