Agradecimentos: The authors are grateful to FAPESP and CNPq foundation and to Labmulti (IFGW) Unicamp for laser writing technical support, as well as to the Center for Computational Engineering and Sciences (CCES-CEPID/UNICAMP) for support of computational facilities. E.A.P.-N. is grateful to FAPESP for financial support of his PhD (process no. 2012/21090-5); Abstract: This work presents a two-dimensional (2D) ...