Coupled-Plasmon-Controlled Transmission in Distributed Bragg Structures

TL;DR

This paper investigates how plasmonic effects in a structured metal-insulator-metal grating can be used to control light transmission properties, with potential applications in optical devices.

Contribution

It introduces a detailed finite element analysis of plasmon-mediated transmission in a novel periodically modulated MIM structure, demonstrating control over transmission characteristics.

Findings

Efficient coupling of plane-waves to gap plasmon modes.

Control over bandwidth and intensity of transmitted radiation.

Correlation of eigenmodes with transmission properties.

Abstract

Using the finite element method we investigate plasmon-mediated transmission in a periodically modulated metal-insulator-metal (MIM) grating. We compute the eigenmodes of a silver-silica-silver conformal coating atop an array of close-packed silica rods, and correlate them with extinction and transmission characteristics of the structure. We observe efficient coupling of impinging plane-waves to gap plasmon modes, allowing control of both bandwidth and intensity of the transmitted radiation.