Environmental Sensitivity of Fabry-Perot Microcavities Induced by Layered Graphene-Dielectric Hybrid Coatings

Rui Peixoto, J.P. Santos Pires, Catarina S. Monteiro, Maria Raposo, Paulo A. Ribeiro, Susana O. Silva, Orlando Frazão, and J.M. Viana Parente Lopes
Phys. Rev. Applied 16, 044041 – Published 22 October 2021

Abstract

We propose a fiber-based environmental sensor that exploits the reflection-phase-shift tunability provided by the use of layered coatings composed of dielectric slabs spaced by conducting membranes. A transfer-matrix study is done in a simplified theoretical model, for which an enhanced sensitivity of the reflection interference pattern to the output medium is demonstrated, in the typical refractive index range of liquid media. An experimental configuration using a cascaded Fabry-Perot microcavity coated by a graphene oxide/polyethylenimine (GO/PEI) multilayered structure is demonstrated. Its cost-effective chemical production method makes graphene oxide–based hybrid coatings excellent candidates for future real-life sensing devices.

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  • Received 2 June 2021
  • Revised 26 August 2021
  • Accepted 5 October 2021

DOI:https://doi.org/10.1103/PhysRevApplied.16.044041

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Rui Peixoto1,§, J.P. Santos Pires1,*,§, Catarina S. Monteiro2,3,†,§, Maria Raposo4, Paulo A. Ribeiro4, Susana O. Silva2, Orlando Frazão2, and J.M. Viana Parente Lopes1,‡

  • 1Centro de Física das Universidades do Minho e Porto and Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
  • 2Institute for Systems and Computer Engineering, Technology and Science (INESC TEC) and Department of Physics and Astronomy, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, Porto 4169-007, Portugal
  • 3Faculty of Engineering, University of Porto, R. Dr. Roberto Frias, Porto 4200-465, Portugal
  • 4Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica 2829-516, Portugal

  • *up201201453@fc.up.pt
  • catarina.s.monteiro@inesctec.pt
  • jlopes@fc.up.pt
  • §These three authors contributed equally to the work

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Vol. 16, Iss. 4 — October 2021

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