Full optical responses of one-dimensional metallic photonic crystal slabs

TL;DR

This paper provides a comprehensive analysis of the linear optical responses of one-dimensional metallic photonic crystal slabs, revealing their reflection, transmission, diffraction properties, and the role of surface plasmon polaritons.

Contribution

It introduces a numerical method to accurately compute optical responses of MPhCS without assuming perfect conductivity, highlighting their unique optical behaviors.

Findings

Nearly perfect transmission and reflection observed.

Large reflective diffraction in the structure.

Photonic states originate from surface plasmon polaritons.

Abstract

We reveal all the linear optical responses, reflection, transmission, and, diffraction, of typical one-dimensional metallic photonic crystal slabs (MPhCS) with the periodicity of a half micrometer. Maxwell equations for the structure of deep grooves are solved numerically with good precision by using the formalism of scattering matrix, without assuming perfect conductivity. We verify characteristic optical properties such as nearly perfect transmission and reflection. Moreover, we present large reflective diffraction and show that, in the energy range where diffraction channels are open, the photonic states in the MPhCS originate from surface plasmon polaritons.