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. 2015 Nov 19;5:16998. doi: 10.1038/srep16998

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Copyright © 2015, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 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/4.0/

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The solid red line shows the simulated spectra of absorption in the graphene for the structure in Fig. 1c. The absorption for the structures with just one type of crosses is described by the dashed blue line (large crosses) and dashed purple line (small crosses). The flat dashed line shows the absorption in a free standing graphene without enhancement.