1. Department of Physics, Federal University of Paraná, P.O. Box 19044, 81531-990 Curitiba, Paraná, Brazil
2. Department of Chemistry, Federal University of Paraná, P.O. Box 19081, 81531-990 Curitiba, Paraná, Brazil
3. Department of Applied Physics, Aalto University School of Science, P.O. Box 14100, FI-00076 Aalto, Finland
4. Department of Physics, Technological Federal University of Paraná, Curitiba 80230-901, Brazil