Beam Manipulation by Hybrid Plasmonic-Dielectric Metasurfaces

TL;DR

This paper introduces a hybrid plasmonic-dielectric metasurface combining graphene and silicon to enable reconfigurable, low-loss, and CMOS-compatible beam manipulation functionalities like focusing and anomalous reflection.

Contribution

It presents a novel hybrid metasurface design that merges graphene's reconfigurability with dielectric low-loss properties, enabling advanced beam control.

Findings

Demonstrated focusing and anomalous reflection functionalities

Achieved reconfigurability and low-loss operation

Showcased potential for high-efficiency optical components

Abstract

A hybrid plasmonic-dielectric metasurface is proposed in order to manipulate beam propagation in desired manners. The metasurface is composed of patterned hybrid graphene-silicon nano-disks deposited on a low-index substrate, namely silica. It is shown that the proposed hybrid metasurface simultaneously benefits from the advantages of graphene-based metasurfaces and dielectric ones. Specially, we show that the proposed hybrid metasurface not only provides reconfigurability, just like previously proposed graphene-based metasurfaces, but also similar to dielectric metasurfaces it is low loss and CMOS-compatible. Such exceptional features give the metasurface exceptional potentials to realize high efficient optical components. To demonstrate the latter point, focusing and anomalous reflection are performed making use of the proposed hybrid structure as examples of two well-known optics functionalities. This work opens up a new route in realization of reconfigurable meta-devices with widely real-world applications which cannot be achieved with their passive counterparts.