Modulation of mid-IR radiation by a gated graphene on ferroelectric substrate

TL;DR

This paper demonstrates theoretically that low-voltage gating of graphene on ferroelectric PZT substrates can modulate mid-IR radiation with about 10% depth, offering potential for tunable IR devices.

Contribution

It introduces a theoretical model showing how gating graphene on ferroelectric substrates can modulate mid-IR radiation effectively.

Findings

10% modulation depth for 5-layer graphene

Effective modulation at low gate voltages

Potential for tunable mid-IR devices

Abstract

The possibility of modulation of mid-IR radiation by low voltage gated single/multilayer graphene on Pb(ZrxTi1-x)O3 (PZT) ferroelectric substrate was demonstrated theoretically. The depth of modulation for 5 layer graphene for the range of gate voltages, where thin PZT epitaxial film behaves as high-{\kappa} dielectric, can be of 10% order.