Work

Through-substrate terahertz time-domain reflection spectroscopy for environmental graphene conductivity mapping

Year: 2020

Type: article

Abstract: We demonstrate how terahertz time-domain spectroscopy (THz-TDS) operating in reflection geometry can be used for quantitative conductivity mapping of large area chemical vapor deposited graphene films through silicon support. We validate the technique against measurements performed using the established transmission based THz-TDS. Our through-substrate approach allows unhindered access to the graphene top surface and thus, as we discuss, opens up pathways to perform in situ and in-operando THz-TDS using environmental cells.

Source: Applied Physics Letters

DOI: 10.1063/1.5135644

Authors: Hungyen Lin, Oliver J. Burton, Sebastian Engelbrecht, Kai-Henning Tybussek, Bernd M. Fischer, Stephan Hofmann

Institutions: Lancaster University, University of Cambridge, Institut Franco-Allemand de Recherches de Saint-Louis

Language: English

Topic: Terahertz technology and applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funder: Engineering and Physical Sciences Research Council