Low-bias active control of terahertz waves by coupling large-area CVD graphene to a terahertz metamaterial

Valmorra, Federico and Scalari, Giacomo and Maissen, Curdin and Fu, Wangyang and Schönenberger, Christian and Choi, Jong Won and Park, Hyung Gyu and Beck, Mattias and Faist, Jérôme. (2013) Low-bias active control of terahertz waves by coupling large-area CVD graphene to a terahertz metamaterial. Nano Letters, Vol. 13, H. 7 , S. 3193–3198.

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Official URL: http://edoc.unibas.ch/dok/A6212026

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We propose an hybrid graphene/metamaterial device based on terahertz electronic split-ring resonators directly evaporated on top of a large-area single-layer CVD graphene. Room temperature time-domain spectroscopy measurements in the frequency range from 250 GHz to 2.75 THz show that the presence of the graphene strongly changes the THz metamaterial transmittance on the whole frequency range. The graphene gating allows active control of such interaction, showing a modulation depth of 11.5% with an applied bias of 10.6 V. Analytical modeling of the device provides a very good qualitative and quantitative agreement with the measured device behavior. The presented system shows potential as a THz modulator and can be relevant for strong light–matter coupling experiments.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Fu, Wangyang and Schönenberger, Christian
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:13 Oct 2017 07:34
Deposited On:31 Jan 2014 09:49

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