Low-bias gate tunable terahertz plasmonic signatures in chemical vapour deposited graphene of varying grain size

Varun S. Kamboj; Philipp Braeuninger-Weimer; Piran R. Kidambi; David S. Jessop; Angadjit Singh; Juraj Sibik; Yuan Ren; Stephan Hofmann; J. Axel Zeitler; Harvey E. Beere; David A. Ritchie

doi:10.1117/12.2209724

25 February 2016 Low-bias gate tunable terahertz plasmonic signatures in chemical vapour deposited graphene of varying grain size

Varun S. Kamboj, Philipp Braeuninger-Weimer, Piran R. Kidambi, David S. Jessop, Angadjit Singh, Juraj Sibik, Yuan Ren, Stephan Hofmann, J. Axel Zeitler, Harvey E. Beere, David A. Ritchie

Author Affiliations +

Proceedings Volume 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX; 974707 (2016) https://doi.org/10.1117/12.2209724
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

We report the characterization of centimeter sized graphene field-effect transistors with ionic gating which enables active frequency and amplitude modulation of terahertz (THz) radiation. Chemical vapour deposited graphene with different grain sizes were studied using THz time-domain spectroscopy. We demonstrate that the plasmonic resonances intrinsic to graphene can be tuned over a wide range of THz frequencies by engineering the grain size of the graphene. Further frequency tuning of the resonance, up to ~65 GHz, is achieved by electrostatic doping via ionic gating. These results present the first demonstration of tuning the intrinsic plasmonic resonances in graphene.

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Varun S. Kamboj, Philipp Braeuninger-Weimer, Piran R. Kidambi, David S. Jessop, Angadjit Singh, Juraj Sibik, Yuan Ren, Stephan Hofmann, J. Axel Zeitler, Harvey E. Beere, and David A. Ritchie "Low-bias gate tunable terahertz plasmonic signatures in chemical vapour deposited graphene of varying grain size", Proc. SPIE 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 974707 (25 February 2016); https://doi.org/10.1117/12.2209724

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