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Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy. / Lin, Hungyen; Braeuninger-Weimer, Philipp; Kamboj, Varun S. et al.
In: Scientific Reports, Vol. 7, No. 1, 10625, 06.09.2017.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Lin, H, Braeuninger-Weimer, P, Kamboj, VS, Jessop, DS, Degl'innocenti, R, Beere, HE, Ritchie, DA, Zeitler, JA & Hofmann, S 2017, 'Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy', Scientific Reports, vol. 7, no. 1, 10625. https://doi.org/10.1038/s41598-017-09809-7

APA

Lin, H., Braeuninger-Weimer, P., Kamboj, V. S., Jessop, D. S., Degl'innocenti, R., Beere, H. E., Ritchie, D. A., Zeitler, J. A., & Hofmann, S. (2017). Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy. Scientific Reports, 7(1), Article 10625. https://doi.org/10.1038/s41598-017-09809-7

Vancouver

Lin H, Braeuninger-Weimer P, Kamboj VS, Jessop DS, Degl'innocenti R, Beere HE et al. Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy. Scientific Reports. 2017 Sept 6;7(1):10625. doi: 10.1038/s41598-017-09809-7

Author

Lin, Hungyen ; Braeuninger-Weimer, Philipp ; Kamboj, Varun S. et al. / Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy. In: Scientific Reports. 2017 ; Vol. 7, No. 1.

Bibtex

@article{624d334d418143d2ad40697c0153cac2,
title = "Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy",
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 vapour deposited graphene films on sapphire, silicon dioxide/silicon and germanium. We validate the technique against measurements performed with previously established conventional transmission based THz-TDS and are able to resolve conductivity changes in response to induced back-gate voltages. Compared to the transmission geometry, measurement in reflection mode requires careful alignment and complex analysis, but circumvents the need of a terahertz transparent substrate, potentially enabling fast, contactless, in-line characterisation of graphene films on non-insulating substrates such as germanium.",
keywords = "Graphene, Imaging and sensing",
author = "Hungyen Lin and Philipp Braeuninger-Weimer and Kamboj, {Varun S.} and Jessop, {David S.} and Riccardo Degl'innocenti and Beere, {Harvey E.} and Ritchie, {David A.} and Zeitler, {J. Axel} and Stephan Hofmann",
year = "2017",
month = sep,
day = "6",
doi = "10.1038/s41598-017-09809-7",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

RIS

TY - JOUR

T1 - Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy

AU - Lin, Hungyen

AU - Braeuninger-Weimer, Philipp

AU - Kamboj, Varun S.

AU - Jessop, David S.

AU - Degl'innocenti, Riccardo

AU - Beere, Harvey E.

AU - Ritchie, David A.

AU - Zeitler, J. Axel

AU - Hofmann, Stephan

PY - 2017/9/6

Y1 - 2017/9/6

N2 - We demonstrate how terahertz time-domain spectroscopy (THz-TDS) operating in reflection geometry can be used for quantitative conductivity mapping of large area chemical vapour deposited graphene films on sapphire, silicon dioxide/silicon and germanium. We validate the technique against measurements performed with previously established conventional transmission based THz-TDS and are able to resolve conductivity changes in response to induced back-gate voltages. Compared to the transmission geometry, measurement in reflection mode requires careful alignment and complex analysis, but circumvents the need of a terahertz transparent substrate, potentially enabling fast, contactless, in-line characterisation of graphene films on non-insulating substrates such as germanium.

AB - We demonstrate how terahertz time-domain spectroscopy (THz-TDS) operating in reflection geometry can be used for quantitative conductivity mapping of large area chemical vapour deposited graphene films on sapphire, silicon dioxide/silicon and germanium. We validate the technique against measurements performed with previously established conventional transmission based THz-TDS and are able to resolve conductivity changes in response to induced back-gate voltages. Compared to the transmission geometry, measurement in reflection mode requires careful alignment and complex analysis, but circumvents the need of a terahertz transparent substrate, potentially enabling fast, contactless, in-line characterisation of graphene films on non-insulating substrates such as germanium.

KW - Graphene

KW - Imaging and sensing

U2 - 10.1038/s41598-017-09809-7

DO - 10.1038/s41598-017-09809-7

M3 - Journal article

AN - SCOPUS:85028943994

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 10625

ER -