Correlated Disordered Plasmonic Nanostructures Arrays for Augmented Reality
Plasmonic resonators are used to control reflectance of functionalized substrates. Their subwavelength characteristic dimensions enable to modify the color of transparent glass plates without altering the transparency quality. Their spatial arrangement must be carefully chosen so that the plates don’t produce non-specular diffraction, whatever their spatial density. The response of silver nanoparticles (NPs) arrays depends on the NPs sizes, spatial densities, and arrangements (periodic and correlated disordered). The effects of these geometrical parameters are analyzed in detail by measuring the reflectance and transmittance spectra in visible wavelength. We show that correlated disordered gratings attenuate diffraction effects appearing at lower spatial densities while keeping similar reflectance and transmittance responses and maintaining clear transparency of the glass plate. Promising configurations for head-up displays and applications in augmented reality emerge from these results. An objective of the studies consists in designing and fabricating with low-cost process a large area transparent plate, functionalized with resonant nanostructures. The plate will have the optical properties required for a compact system of augmented reality, like reflection and focalization properties preserving the clear transparency of the plate in visible range.
