Resonant transmission of light through finite chains of subwavelength holes

TL;DR

This paper demonstrates that extraordinary optical transmission occurs in finite chains of subwavelength holes, introducing a new theoretical framework to analyze their optical properties regardless of shape or placement.

Contribution

The authors present a novel theoretical approach to study optical transmission in finite collections of subwavelength apertures, extending understanding beyond 2D arrays.

Findings

Transmission phenomenon is present in linear chains of holes

New theoretical framework for arbitrary hole shapes and arrangements

Applicable to finite collections of apertures in metallic films

Abstract

In this paper we show that the extraordinary optical transmission phenomenon found before in 2D hole arrays is already present in a linear chain of subwavelength holes, which can be considered as the basic geometrical unit showing this property. In order to study this problem we have developed a new theoretical framework, able to analyze the optical properties of finite collections of subwavelength apertures and/or dimples (of any shape and placed in arbitrary positions) drilled in a metallic film.