Graphene-TMD van der Waals Heterostucture Plasmonics

TL;DR

This paper reports the discovery of a unique surface plasmon mode in graphene-2D TMD heterostructures, highlighting their potential for ultra-sensitive biosensing applications due to their sensitive plasmonic properties.

Contribution

It introduces a novel plasmon mode in graphene-TMD heterostructures and explores its implications for biosensing technology.

Findings

Observation of a highly unusual surface plasmon mode

Potential for ultra-sensitive biosensing applications

Enhanced plasmonic response in graphene-TMD heterostructures

Abstract

The collective excitations of electrons in the bulk or at the surface, namely plasmons, play an important role in the properties of materials, and have generated the field of plasmonics. We report the observation of a highly unusual plasmon mode on the surface of Van der Waals heterostructures of graphene monolayer on 2D transition metal dichalcogenide substrate. Since the exponentially decaying fields of surface plasmon wave propagating along interface is highly sensitive to the ambient refractive index variations, such heterostructures are useful for ultra-sensitive bio-sensing.