New Analytical Approach Based on Transfer Matrix Method (TMM) for Study of Tunable Plasmonic Modes in Graphene-Based Heterostructures

TL;DR

This paper introduces an analytical transfer matrix method to study and control the reflection and group delay of optical beams in graphene-hBN heterostructures, enabling tunable plasmonic device design.

Contribution

It presents a novel analytical model using transfer matrix method for analyzing tunable plasmonic modes in graphene-based heterostructures.

Findings

High reflected group delay of 15.3 ps at 24.9 THz

Effective control of reflection characteristics via graphene chemical potential

Potential for designing advanced mid-infrared graphene-hBN devices

Abstract

This paper aims to study the reflection characteristics of optical beams in a hybrid graphene-hexagonal Boron Nitride (hBN)-graphene structure, which has been located on SiO2-Si layers. An analytical model is presented to derive the reflection characteristics by using the transfer matrix method. The upper Reststrahlen band has been chosen as the studied frequency range. It is shown that the characteristics of the reflected beam can be effectively controlled by varying the chemical potential of graphene sheets. The obtained results represent a high value of the reflected group delay (=15.3 ps) at the frequency of 24.9 THz. The presented investigation will be helpful to control the group delays of reflected beams and can be utilized for the design of innovative graphene-hBN devices in the mid-infrared wavelengths.