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- Title
Non-Linear Conductivity Response of Graphene on Thin-Film PET Characterized by Transmission and Reflection Air-Plasma THz-TDS.
- Authors
Zhou, Binbin; Rasmussen, Mattias; Whelan, Patrick Rebsdorf; Ji, Jie; Shivayogimath, Abhay; Bøggild, Peter; Jepsen, Peter Uhd
- 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 non-linear and instantaneous conductivity depletion across an ultra-broad bandwidth (1–9 THz) under relatively high incident THz electrical field strengths (up to 1050 kV/cm).
- Subjects
TERAHERTZ spectroscopy; GRAPHENE; REFLECTANCE spectroscopy
- Publication
Sensors (14248220), 2023, Vol 23, Issue 7, p3669
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s23073669