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. 2017 Jun 2;6(6):e16277. doi: 10.1038/lsa.2016.277

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Electrostatic tuning of plasmonic resonances in 1L- and 2L-GNRAs. (a) Electrostatic biasing scheme of graphene nanoribbon arrays. The biasing voltage is applied across the 280-nm-thick SiO₂ layer. Negative (positive) voltages shift the Fermi level (E_F) of our p-doped graphene away from (toward) the Dirac point. (b, c) Experimental extinction spectra of 1L- and 2L-GNRAs for different biasing voltages V_g. For 1L-GNRAs the voltage V_g is varied between 0 V (black) and −100 V (red), whereas for 2L-GNRAs V_g is varied between +100 V (blue) and −100 V (red). (d, e) Extinction value and spectral position of the measured plasmonic peak in 1L- and 2L-GNRAs for different ribbon widths W and biasing voltages V_g.