Electronic modulation of infrared emissivity in graphene plasmonic resonators

TL;DR

This paper demonstrates the electronic modulation of infrared emissivity in graphene plasmonic resonators, enabling tunable mid-infrared blackbody radiation through electrostatic gating at elevated temperatures.

Contribution

It introduces a method to control blackbody emission in graphene resonators via carrier density modulation, combining plasmonic and vibrational effects.

Findings

Spectral emission peaks are tunable by gate voltage.

Emission occurs at temperatures up to 250°C.

Resonators produce narrow mid-IR emission features.

Abstract

Electronic control of blackbody emission from graphene plasmonic resonators on a silicon nitride substrate is demonstrated at temperatures up to 250 C. It is shown that the graphene resonators produce antenna-coupled blackbody radiation, manifest as narrow spectral emission peaks in the mid-IR. By continuously varying the nanoresonators carrier density, the frequency and intensity of these spectral features can be modulated via an electrostatic gate. We describe these phenomena as plasmonically enhanced radiative emission originating both from loss channels associated with plasmon decay in the graphene sheet and from vibrational modes in the SiNx.