Graphene oxide as a tunable platform for microsphere-based optical fiber sensors

Catarina S. Monteiro, Maria Raposo, Paulo Ribeiro, Susana Silva, Orlando Frazão

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

Hollow microsphere fiber sensors are Fabry-Perot interferometers (FPI) that can be used for lateral loading, temperature, and refractive index sensing. In this work, graphene oxide (GO) is explored as a tunable platform for enhancing the spectral properties of hollow microsphere fiber sensors. GO offers similar mechanical and optical properties as graphene, with the advantage of a wider range of deposition methods and a lower cost. The influence of multilayer coatings of polyethylenimine (PEI) and GO, achieved with the layer-by-layer technique, on the reflectivity of the outer surface, and hence, on the spectrum of the FPI for maximum of 30 bilayers was studied. The obtained results revealed a change of the microsphere outer surface reflectivity and also of visibility of the reflected spectrum when varying the number of bilayers. A maximum signal amplitude of 3.9 dB was attained for the 13th bilayer, allowing to conclude that PEI/GO multilayer coatings can be used for enhancing desired properties of the three-wave FPI for different sensing applications.

Original languageEnglish
Title of host publication4th International Conference on Applications of Optics and Photonics
EditorsManuel F. M. Costa
PublisherSPIE-International Society for Optical Engineering
ISBN (Electronic)9781510631632
DOIs
Publication statusPublished - 1 Jan 2019
Event4th International Conference on Applications of Optics and Photonics, AOP 2019 - Lisbon, Portugal
Duration: 31 May 20194 Jun 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE-International Society for Optical Engineering
Volume11207
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference4th International Conference on Applications of Optics and Photonics, AOP 2019
CountryPortugal
CityLisbon
Period31/05/194/06/19

Keywords

  • Fabry-Perot interferometer
  • graphene oxide
  • Layer-by-layer films
  • optical sensors

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