Photonic transport control by spin-optical disordered metasurface

TL;DR

This paper introduces a novel approach to control photonic transport using disordered spin-optical metasurfaces with tailored geometric phases, enabling advanced multiplexing and wavefront shaping at the nanoscale.

Contribution

It presents a generic concept combining disordered metasurfaces and spin-dependent geometric phase control for enhanced photonic transport manipulation.

Findings

Demonstrated spin-dependent near-field channels

Achieved state-of-the-art multiplexing capabilities

Enabled multitask wavefront shaping in ultrathin devices

Abstract

Photonic metasurfaces are ultrathin electromagnetic wave-molding metamaterials providing the missing link for the integration of nanophotonic chips with nanoelectronic circuits. An extra twist in this field originates from spin-optical metasurfaces providing the photon spin (polarization helicity) as an additional degree of freedom in light-matter interactions at the nanoscale. Here we report on a generic concept to control the photonic transport by disordered (random) metasurfaces with a custom-tailored geometric phase. This approach combines the peculiarity of random patterns to support extraordinary information capacity within the intrinsic limit of speckle noise, and the optical spin control in the geometric phase mechanism, simply implemented in two-dimensional structured matter. By manipulating the local orientations of anisotropic optical nanoantennas, we observe spin-dependent near-field and free-space open channels, generating state-of-the-art multiplexing and interconnects. Spin-optical disordered metasurfaces provide a route for multitask wavefront shaping via a single ultrathin nanoscale photonic device.