Abstract-Sub-Terahertz Frequency-Domain Spectroscopy Reveals Single-Grain Mobility and Scatter Influence of Large-Area Graphene

1. Christian Cervetti¹, 
2. Eric Heintze¹, 
3. Boris Gorshunov^1,2,3, 
4. Elena Zhukova^1,2,3,
5. Svyatoslav Lobanov^2,3, 
6. Alexander Hoyer⁴,
7. Marko Burghard⁴, 
8. Klaus Kern^4,5, 
9. Martin Dressel¹ and
10. Lapo Bogani^1,†,*

Article first published online: 18 MAR 2015

http://onlinelibrary.wiley.com/doi/10.1002/adma.201500599/abstract

DOI: 10.1002/adma.201500599

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

The response of individual domains in wafer-sized chemical vapor deposition graphene is measured by contactless sub-terahertz interferometry, observing the intrinsic optical conductance and reaching very high mobility values. It is shown that charged scatterers limit the mobility, validating previous theoretical predictions, and sub-terahertz quality assessment is demonstrated, as necessary for large-scale applications in touchscreens and wearable and optoelectronic devices.