1. Technology Science Department, Universidad de Guadalajara, Centro Universitario de la Ciénega 1 , Ocotlan, Jalisco 47810, Mexico
2. Department of Physics, FFCLRP, University of São Paulo 2 , Ribeirão Preto, São Paulo 14040-901, Brazil
3. 3 Department of Biomedical Engineering, UT Southwestern Medical Center, Dallas, Texas 75235-7323, USA