All-Dielectric Meta-optics for High-Efficiency Independent Amplitude and Phase Manipulation

TL;DR

This paper introduces a novel meta-optic platform using two lossless metasurfaces to independently and efficiently control both amplitude and phase of light, enabling advanced optical devices and holograms.

Contribution

The work presents a new method for high-efficiency independent amplitude and phase manipulation using two lossless metasurfaces separated by a distance.

Findings

Achieved independent amplitude and phase control with high efficiency.

Demonstrated complex optical components like beam-formers and 3D holograms.

Provided a platform for high-performance holographic displays.

Abstract

Metasurfaces, composed of subwavelength scattering elements, have demonstrated remarkable control over the transmitted amplitude, phase, and polarization of light. However, manipulating the amplitude upon transmission has required loss if a single metasurface is used. Here, we describe high-efficiency independent manipulation of the amplitude and phase of a beam using two lossless phase-only metasurfaces separated by a distance. With this configuration, we experimentally demonstrate optical components such as combined beam-forming and splitting devices, as well as those for forming complex-valued, three-dimensional holograms. The compound meta-optic platform provides a promising approach for achieving high performance optical holographic displays and compact optical components, while exhibiting a high overall efficiency.