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

Abstract

Selective scattering of red, green, and blue light and transmitting other visible light to achieve a transparent projection screen has been proposed based on metallic nanoparticle's localized surface plasmon resonance (LSPR). However, of the many proposed structures, dielectric (TiO2) substrate/silver (Ag) nanocube structure was only demonstrated to selectively scatter blue light in the backward direction. Therefore, for this setup, on one hand, it is of interest to enhance selective backward scattering of red light, and on the other hand, it is of interest to investigate ways of selective forward scattering of both blue and red light. Selective backward scattering may be used in applications such as heads up display (HUD), while selective forward scattering may be applied to, for example, display advertisements on shop windows. In this work, through numerical simulation, forward and backward scattering properties of dielectric substrate/Ag (or gold) nanocube structures were investigated. 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.