Optimizing the photothermoelectric effect in graphene

TL;DR

This paper explores how to enhance graphene-based photothermoelectric devices by adjusting light confinement, device structure, and material quality to improve their speed, sensitivity, and power efficiency for various optical applications.

Contribution

It provides a systematic approach to optimize graphene PTE photodetectors, guiding design improvements for better performance in practical applications.

Findings

Optimized light confinement increases photoresponse.

Device geometry tuning enhances sensitivity.

Material quality improvements reduce noise and increase efficiency.

Abstract

Among its many uses, graphene shows significant promise for optical and optoelectronic applications. In particular, devices based on the photothermoelectric effect (PTE) in graphene can offer a strong and fast photoresponse with high signal-to-noise ratio while consuming minimal power. In this work we discuss how to optimize the performance of graphene PTE photodetectors by tuning the light confinement, device geometry, and material quality. This study should prove useful for the design of devices using the PTE in graphene, with applications including optical sensing, data communications, multi-gas sensing, and others.