Selective scattering of blue and red light based on silver and gold nanocubes

TL;DR

This paper investigates how dielectric substrate/metal nanocube structures can be engineered to achieve selective forward and backward scattering of specific visible light colors, enhancing transparent projection screens.

Contribution

It introduces three novel nanocube designs that enable selective scattering of blue and red light in desired directions, based on numerical simulations.

Findings

Designs achieve selective forward/backward scattering of blue and red light.

Numerical simulations validate the directional scattering properties.

Potential applications in transparent projection screens.

Abstract

Selective scattering of red-, green- and blue-light and transmitting other visible light to achieve transparent projection screen has been proposed recently based on metallic nanoparticle's localized surface plasmon resonance (LSPR). However, dielectric (TiO2) substrate/silver (Ag) nanocube structure was only demonstrated to selectively scatter blue-light in the backward direction. Given human eyes are sensitive to green-light, it is of interest to find out how to achieve selective forward-scattering of blue- and red-light and selective backward-scattering of red-light. In this work, through numerical simulation, forward and backward scattering properties of dielectric substrate/Ag (or gold) nanocube structures are investigated. And based on these properties, three designs are proposed which can achieve selective scattering of blue- and red-light in forward or backward or both directions.