Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Nonlinear Conductivity Response of Graphene on Thin-Film PET Characterized by Transmission and Reflection Air-Plasma THz-TDS

Binbin Zhou
* ,
Mattias Rasmussen
ORCID logo ,
Patrick Rebsdorf Whelan
,
Jie Ji
,
Abhay Shivayogimath
,
Peter Bøggild
,
Peter Uhd Jepsen
Version 1 : Received: 3 March 2023 / Approved: 3 March 2023 / Online: 3 March 2023 (12:28:00 CET)

A peer-reviewed article of this Preprint also exists.

Zhou, B.; Rasmussen, M.; Whelan, P.R.; Ji, J.; Shivayogimath, A.; Bøggild, P.; Jepsen, P.U. Non-Linear Conductivity Response of Graphene on Thin-Film PET Characterized by Transmission and Reflection Air-Plasma THz-TDS. Sensors 2023, 23, 3669. Zhou, B.; Rasmussen, M.; Whelan, P.R.; Ji, J.; Shivayogimath, A.; Bøggild, P.; Jepsen, P.U. Non-Linear Conductivity Response of Graphene on Thin-Film PET Characterized by Transmission and Reflection Air-Plasma THz-TDS. Sensors 2023, 23, 3669.

Abstract

We demonstrate that the conductivity of graphene on thin-film polymer substrates can be accurately determined by reflection-mode air-plasma-based THz time-domain spectroscopy (THz-TDS). The phase uncertainty issue associated with reflection measurements is discussed, and our implementation is validated by convincing agreement with graphene electrical properties extracted from more conventional transmission-mode measurements. Both the reflection and transmission THz-TDS measurements reveal strong nonlinear and instantaneous conductivity depletion across an ultra-broad bandwidth under relatively high incident THz electrical field strengths.

Keywords

Graphene; AC conductivity; THz time-domain spectroscopy; Reflection spectroscopy

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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