Possibilities to generation of optical non-diffracting beams by holographic metasurfaces using surface impedance

TL;DR

This paper demonstrates the computational design of holographic metasurfaces using surface impedance to generate optical non-diffracting beams, with potential applications in various optical and photonic fields.

Contribution

It introduces a method to design holographic metasurfaces controlling phase via surface impedance for generating non-diffracting beams.

Findings

Successful simulation of non-diffracting beam generation

Metasurfaces designed with sub-wavelength metallic patches

Potential applications in optical tweezers and 3D imaging

Abstract

In this work, we present the computational simulations of holographic metasurfaces to generation of the optical non-diffracting beams. The metasurfaces are designed by the holographic technique and the computer-generated holograms (CGHs) of optical non-diffracting beams are generated computationally. These holographic metasurfaces (HMS) are obtained by modeling a periodic lattice of metallic patches on dielectric substrates with sub-wavelength dimensions, where each one of those unit cells change the phase of the incoming wave. We use the surface impedance (Z) to control the phase of the electromagnetic wave through the metasurface in each unit cell. The sub-wavelength dimensions guarantees that the effective medium theory is fulfilled. The results is according to the predicted by non-diffracting beams theory. These results are important given the possibilities of applications in optical tweezers, optics communications, optical metrology, 3D imaging, and others in optics and photonics