Large-scale and tunable transparent displays based on silver nanoparticles metasurface

Abstract

We report a transparent display based on a metasurface of silver nanoparticles (Ag NPs), consisting of a transparent substrate and a layer of Ag NPs deposited by a dielectric film. The Ag NPs metasurface is prepared by a simple and direct annealing process. It presents a deep transmission valley at the wavelength of λ = 468 nm and enables desired transparent display by projecting the monochromatic image onto the metasurface. We also demonstrate that the formed Ag NPs can be approximated as truncated nanospheres, which have obvious directional scattering properties, and can radiate most of the scattered energy into the backward hemisphere with a relatively large angular beamwidth (the full width at half maximum of the scattered intensity) of ~ 90°. Therefore, the fabricated displays possess wide viewing angles and high brightness characteristics. Additionally, the transmission modes can be red-shifted to the wavelength of λ = 527 nm by controlling the thickness of the deposited dielectric film. This approach using traditional thin film deposition and moderate annealing processing techniques enables simple, low-cost, and scalable fabrication in large areas for the transparent displays.

Dual-band perfect absorption graphene metasurface with high modulation in near-infrared

“…The metasurface have brought a revolutionary change to the field of optics because of its potential to construct high-efficiency and multi-functional optoelectronic systems with compact structures [1][2][3][4][5][6]. By designing the geometry, placement and arrangement of its components, the metasurface can flexibly control the amplitude, phase, polarization state, angular momentum and dispersion of the incident light [6,7].…”

“…The metasurface have brought a revolutionary change to the field of optics because of its potential to construct high-efficiency and multi-functional optoelectronic systems with compact structures [1][2][3][4][5][6]. By designing the geometry, placement and arrangement of its components, the metasurface can flexibly control the amplitude, phase, polarization state, angular momentum and dispersion of the incident light [6,7]. Among all these tuning mechanisms, graphene has attracted much attention due to its optical properties as a unique two-dimensional material [8], including its ability to absorb incident light over a broad wavelength range [9], tuning capability in the infrared and terahertz bands [10], and phase tuning capability in metasurfaces [11][12][13][14].…”