Plasmonics in the visible domain for a one-dimensional truncated photonic crystal terminated by graphene: sensing beyond Dirac point's approximation

TL;DR

This paper investigates visible surface plasmon resonances in a graphene-coated one-dimensional photonic crystal, revealing tunable sensing capabilities beyond Dirac point approximations through numerical analysis.

Contribution

It introduces a numerical study of plasmonic Bloch waves beyond Dirac points in a graphene-based photonic sensor, highlighting tunable resonances in the visible spectrum.

Findings

Emergent plasmonic dips are tunable via chemical potential and hopping parameter.

Sensor sensitivity in the visible range is numerically evaluated and compared with terahertz resonances.

The study demonstrates sensing beyond Dirac point approximation in a graphene-terminated photonic crystal.

Abstract

Visible surface plasmon resonances (SPRs) could be excited by TE wave polarization in one-dimensional photonic crystals (PCs) coated by a graphene layer under the Kretschmann configuration. In this work, the plasmonic Bloch wave properties beyond Dirac points in a one-dimensional graphene-based photonic sensing structure have been numerically studied. We demonstrate that emergent plasmonic dips in the reflectance spectra of the suggested photonic device in the visible region exhibit tunable characteristics upon modulation of the chemical potential and the hopping parameter. The sensitivity of the sensor in the visible domain has been numerically evaluated and also was compared with those considering the surface plasmon resonances in the terahertz regime.