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Transition Metal Dichalcogenides/Gold-Based Surface Plasmon Resonance Sensors: Exploring the Geometrical and Material Parameters

  • Pericle VarasteanuEmail author


In this study, we explored the geometrical and material parameters of surface plasmon resonance (SPR) sensors, in order to gain insight about the mechanisms that control the sensors’ response when different 2D materials monolayers (MoS2, MoSe2, WS2, WSe2) are used to modify the surface. Accordingly, the surface plasmons’ (SPs) dispersion relations, the reflectivity maps and both reflectivity and phase responses for the visible and near-infrared wavelengths range (400–1400 nm), were systematically investigated by using COMSOL Multiphysics (RF Module) and transfer matrix method (TMM) algorithm considering a modified Kretschmann configuration. We showed that the sensitivity of the modified structures is enhanced for wavelengths between 600 and 1000 nm both in reflectivity and phase. By evaluating also the influence of the number of 2D material monolayers, the highest sensitivity in reflectivity was obtained at 700 nm when five monolayers of MoS2 were added, reaching 220 deg/RIU for a change in dielectric’s refractive index of 0.002 RIU, which is 45% higher than that of the standard bare structure. Regarding the phase response, it was shown that by adding only one monolayer of MoS2, a sensitivity of 9 × 105 deg/RIU is achieved for a refractive index change of 10−6 RIU.


SPR sensor 2D materials Dispersion relations Sensitivity enhancement Phase response 



Pericle Varasteanu thanks Dr. Cristian Kusko of the IMT Bucharest for stimulating discussions.

Funding Information

This work was supported by a grant of Ministry of Research and Innovation, CNCS-UEFISCDI, projects’ number PN-III-P4-ID-PCE-2016-0618 and PN-III-P1-1.2-PCCDI-2017-0820, within PNCDI III.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.National Institute for Research and Development in Microtechnology (IMT Bucharest)VoluntariRomania
  2. 2.Faculty of PhysicsUniversity of BucharestMagureleRomania

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