Polarization multiplexing for double images display

Abstract

Metasurface provides subwavelength structures for manipulating wavefronts of light. The benefits of subwavelength components offer a continuous modulation of amplitude, phase, and polarization, thus eliminating the production of higher-order images and improving the utilization of light intensity. Despite the rapid progress in this field, multiparameter control of light using single layer metasurface is rarely reported. In fact, multiparameter control of light helps to improve information storage capacity and image fidelity. With simultaneous manipulation of polarization and amplitude at each pixel, it is possible to encode two separate images into one metasurface and reconstruct them under proper conditions. In a proof of concept experiment, we demonstrate an independent display of two binary images at the same position with polarization de-multiplexing from a single metasurface. This unique technology of encoding two images through amplitude and polarization manipulation provides a new opportunity for various applications in, such as encryption, information storage, polarization holograms, optical communications and fundamental physics.

Efficient Optical Angular Momentum Manipulation for Compact Multiplexing and Demultiplexing Using a Dielectric Metasurface

“…Optical multiplexing/demultiplexing utilizing the intrinsic physical properties of light including frequency,1–3 polarization4,5 and guided mode6–8 has played a crucial role in high‐capacity data storage and high‐speed communications. As one of the fundamental and important degree of freedom of light, angular momentum (AM) encompasses spin angular momentum (SAM) and orbital angular momentum (OAM) 9–13.…”

Multifunctional Geometric Metasurfaces Based on Tri‐Spectral Meta‐Atoms with Completely Independent Phase Modulations at Three Wavelengths

“…By judiciously engineered subwavelength scatterers, metasurfaces can enable us to manipulate the phase, amplitude, and/or polarization responses of electromagnetic waves at a subwavelength scale. A plethora of fascinating metadevices based on metasurfaces have been designed and demonstrated, including metasurface‐based lenses or metalenses, [ 5–7 ] cloaking, [ 8 ] meta‐holograms, [ 9–13 ] and vortex beam generators. [ 14–16 ]…”

Switchable Quarter-Wave Plate and Half-Wave Plate Based on Phase-Change Metasurface

“…Metasurface, an artificial two-dimensional material with the structure size smaller than the operation wavelength, possesses the ability of flexible controlling the phase, amplitude, polarization and frequency, leading to many intriguing electromagnetic phenomena, such as anomalous reflection and refraction [1], hologram [2]- [4], directional excitation [5], [6] and perfect absorption [7]. Recently, plasmonic wave plate, multi-layer stacked wave plate, reflected quarter-wave plate and dielectric wave plate have been proposed by engineering the metasurface to control electromagnetic wave [8]- [19].…”