1. Department of Semiconductors, Instruments and Photonics (DSIF), School of Electrical and Computer Engineering, University of Campinas (UNICAMP), Campinas 13083-852, Brazil.
2. Department of Computational Mechanics (DMC), School of Mechanical Engineering (FEM), University of Campinas (UNICAMP), Campinas 13083-860, Brazil.
3. Integrated Micro and Nanotechnologies Research Group (IMiNa) of the International Iberian Nanotechnology Laboratory (INL), Braga 4715-330, Portugal.