TY - GEN
T1 - Graphene oxide as a tunable platform for microsphere-based optical fiber sensors
AU - Monteiro, Catarina S.
AU - Raposo, Maria
AU - Ribeiro, Paulo
AU - Silva, Susana
AU - Frazão, Orlando
N1 - info:eu-repo/grantAgreement/FCT/5876/147412/PT#
C.S. Monteiro was financed by FCT -E Portuguese national funding agency for science, research and technology (SFRH/BD/135820/2018).
financial support from FEDER, through Programa Operacional Factores de Competitividade COMPETE and Fundação para a Ciência e a Tecnologia through research project grants, PTDC/FIS-NAN/0909/2014 and UID/FIS/00068/2019.
This work is financed by National Funds through the Portuguese funding agency, FCT - Fundação para a Ciência e a Tecnologia within project: UID/EEA/50014/2019.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
KW - Fabry-Perot interferometer
KW - graphene oxide
KW - Layer-by-layer films
KW - optical sensors
UR - https://www.scopus.com/pages/publications/85074285675
U2 - 10.1117/12.2527267
DO - 10.1117/12.2527267
M3 - Conference contribution
AN - SCOPUS:85074285675
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 4th International Conference on Applications of Optics and Photonics
A2 - Costa, Manuel F. M.
PB - SPIE-International Society for Optical Engineering
T2 - 4th International Conference on Applications of Optics and Photonics, AOP 2019
Y2 - 31 May 2019 through 4 June 2019
ER -