Polarization anisotropic transmission through metallic Sierpinski-Carpet aperture array

Yuan Chen,Li Zhan,Tianmeng Wang,Jian Wu

doi:10.1364/oe.22.002222

Abstract

Extraordinary optical transmission through rectangular Sierpinski -Carpet aperture array on an Ag film has been observed. Attributed to the fractal-featured rectangle array, it exhibits polarization dependence and dual-band transmission simultaneously. In addition, the incident angle invariance transmission displays within a certain angle range, which is quite different from ordinary rectangles. This report provides a way to achieve the polarization-manipulated multi-band transmission in infrared region.

Highlights

According to the classical diffraction theory, when light illuminates on an infinitely thin perfect conductor with a hole on it, the transmission is proportional to (r λ)4 (r is the radius of the hole and λ is the wavelength of incident light) [1]
The incident angle invariance transmission displays within a certain angle range, which is quite different from ordinary rectangles
It will have a potential application in integrated light-emitting device, detective device and displays [20]

Summary

Introduction

According to the classical diffraction theory, when light illuminates on an infinitely thin perfect conductor with a hole on it, the transmission is proportional to (r λ) (r is the radius of the hole and λ is the wavelength of incident light) [1]. The rectangular Sierpinski-Carpet (RSC) aperture array studied in this paper is an overall self-similar structure, which is constructed by many different size ordinary rectangles. The x- and y-axis polarized incidence permeates different wavelengths respectively, but the transmission peaks almost do not change when the incident angle varies The former is in accord with the property of the rectangular hole array while the latter is not [14, 15]. This distinct property stems from the influence of the tiny spacing between the small holes and the big ones, which affects both the surface plasmon polaritons (SPPs) and the localized surface plasmons (LSPs) This structure achieves the polarizationmanipulated anisotropic transmission and incident angle invariance

Experimental structure and theory

Results and discussion

Conclusion