Federal University of Technology-Paraná, 80230-901 Curitiba, Brazil;
ENEA, C.R. Frascati, Photonics Micro and Nanostructures Laboratory, UTAPRAD-MNF, V.E.Fermi 45,00044 Frascati(Rome), Italy;
Department of Physics, Universidade Federal de Pernambuco, Recife, Brazil;
ENEA, C.R. Frascati, Photonics Micro and Nanostructures Laboratory, UTAPRAD-MNF, V.E.Fermi 45,00044 Frascati(Rome), Italy;
Federal University of Technology-Paraná, 80230-901 Curitiba, Brazil;
Federal University of Technology-Paraná, 80230-901 Curitiba, Brazil;