Funding Information: This study received support from Portuguese funding provided through the Centre for Mathematics via the following projects: DOI 10.54499/UIDP/00013/2020 , DOI 10.54499/UIDB/00013/2020 , and the Portuguese Foundation for Science and Technology (FCT), Portugal through the Individual PhD Scholarship PD/BD/150535/2019 , the research grant UIDB / 04292/2020 , and the project PTDC/MAT-STA/28243/2...
Funding: The research leading to these results has received funding from the Portuguese funding agency FCT—Fundação para a Ciência e a Tecnologia—within project UID/FIS/04559/2020 to LIB-Phys-UNL and from the FCT/MCTES/PIDDAC. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.; Thin films of titanium dioxide (TiO2) and titanium (Ti) were deposited onto glass and optical fiber support...