Possible dimensionality transition behavior in localized plasmon resonances of confinement-controlled graphene devices

TL;DR

This study explores how the dimensionality of localized plasmon resonances in graphene transitions from two-dimensional to one-dimensional as carrier density varies, confirmed through experimental device fabrication and theoretical analysis.

Contribution

It demonstrates the controllable dimensionality transition of graphene plasmon resonances based on carrier density, supported by device fabrication and theoretical predictions.

Findings

Dimensionality transition from 2D to 1D plasmon resonance observed

Device fabrication enabled detailed control of carrier density

Results align with Dirac Fermion carrier theory in graphene

Abstract

We investigated the dimensionality transition behavior of graphene localized plasmon resonances in confinement-controlled graphene devices. We first demonstrated a possibility of dimensionality transition, based on the devices carrier-density dependence, from a two-dimensional plasmon resonance to a one-dimensional plasmon one. We fabricated optical transparent devices and electrical transport devices on the same optical transparent wafer. These devices allow detailed control and analysis between carrier density and plasmon resonance peak positions. The carrier density from square root n (two-dimensional) to constant (one-dimensional) is consistent with the theoretical predictions based on the Dirac Fermion carriers in linear-band structure materials.