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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Schematic picture of Cu—TMDCs—graphene enhanced SPR biosensor system. The difference of GH shift for TM and TE waves are measured in order to improve the signal to noise ratio since the signals for TE waves can be used as a reference.