Multispectral narrowband frustrated total internal reflection filter with inclusions of plasmonic nanoparticles

TL;DR

This paper investigates a spatial-frequency thin-film filter with embedded plasmonic nanoparticles, demonstrating how plasmonic effects induce spectral line splitting and angular beam splitting in the visible spectrum.

Contribution

It introduces a novel filter design incorporating nanoparticles and analyzes their impact on spectral and angular properties considering dispersion effects.

Findings

Plasmonic effects cause spectral bandwidth splitting into narrow lines.

Nanoparticles induce angular splitting of incident beams.

The filter operates effectively in the visible spectrum.

Abstract

A spatial-frequency thin-film filter with inclusions of nanoparticles operating in the visible range of the spectrum is investigated. The effect of nanoparticles embedded in the central and lateral layers of the frustrated total internal reflection filter on the spectral characteristics, taking into account the frequency dispersion, is investigated. It is shown that plasmonic effects cause splitting of the filter bandwidth into a set of narrow-band spectral lines and angular splitting of the incident beam into a set of output beams.