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

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2019

Autores

Monteiro, CS (Autor) Outra; Raposo, M (Autor) Outra; Ribeiro, P (Autor) Outra; Susana Silva (Autor) FCUP; Frazao, O (Autor) FCUP

Ata de Conferência Internacional

Título: FOURTH INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS

4th International Conference on Applications of Optics and Photonics (AOP)

Univ Lisbon, Lisbon, PORTUGAL, MAY 31-JUN 04, 2019

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00R-8AD

DOI: 10.1117/12.2527267

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5