New Publication: Toward efficient and tailorable mid-infrared emitters utilizing multilayer graphene

Congratulations to fourth-year PGR Dean Patient, whose paper ‘Toward efficient and tailorable mid-infrared emitters utilizing multilayer graphene’ was recently published in Applied Physics Letters.

Dean summarises the paper’s findings:

In this work, we experimentally fabricate devices consisting of multi-layer graphene with an incorporated back-reflector. The resultant devices have a roughly 4-fold increase in emission compared to identical devices without the mirror. Such devices can no longer be modelled using a simple Blackbody model, and so we derive two analytic methods to understand how these devices work. The first describes the power output via. the fluctuation-dissipation theorem, and the second is a more simple approach, approximating the device as being `blackbody-like’, but allowing the greybody factor to be temperature and wavelength dependant. We find that both theories accurately model the devices, and fit well to the experimental data. We finally show that the efficiency of these devices are comparable to current LED architectures, demonstrating the feasibility of developing graphene-based mid-infared LEDs, which could be more cost effective and sustainable to manufacture.

Please read below for the paper’s abstract:

Abstract