Enhanced Brewster Angle Shift in Doped Graphene via the Fizeau Drag Effect

TL;DR

This paper investigates how the Fizeau drag effect in doped graphene enhances the Brewster angle shift, significantly affecting optical properties and enabling tunable control for advanced photonic device applications.

Contribution

It derives Fresnel coefficients incorporating the Fizeau drag effect in doped graphene, revealing enhanced Brewster angle shifts and their tunability via electron drift velocities and charge densities.

Findings

Fizeau drag significantly increases Brewster angle shift in doped graphene.

The angular shift can be tuned by electron drift velocity and charge density.

Enhanced optical control in graphene-based photonic devices.

Abstract

We derive the general Fresnel coefficients for reflection by incorporating the Fizeau drag effect in doped graphene, which arises from the unique behavior of its massless Dirac electrons. Using the standard Maxwell equations and constitutive relations, we analyze the influence of this relativistic phenomenon on the optical properties of doped graphene. Our study focuses on the angular shift of Brewster's angle in a structure where monolayer graphene is sandwiched between two static dielectric media. Our findings reveal that the presence of the Fizeau drag effect significantly enhances the Brewster angle shift, leading to substantial modifications in the optical characteristics of the graphene channel, including notable alterations in the reflectance spectrum. We demonstrate that this angular shift can be further amplified by increasing the drift velocities and charge densities of the electrons in graphene, offering a tunable mechanism for controlling optical behavior in graphene-based systems. The findings of this work have significant implications for the design and development of planar photonic devices that take advantage of the optical characteristics of graphene. This breakthrough creates new opportunities for the use of graphene in sophisticated photonic technologies, where exact control over the interactions between light and matter is essential.