1. Instituto de Física Gleb Wataghin, UNICAMP, 13083-859 Campinas, SP, Brazil
2. São Carlos Institute of Physics (IFSC), University of São Paulo (USP), P.O. Box 369, 13566-590 São Carlos, SP, Brazil
3. Institute of Light and Matter, University Lyon, Université Claude Bernard Lyon 1, CNRS, UMR5306, F-69622 Villeurbanne, France