Optimal design of NRD guide devices using 2D full-vectorial finite element method

In this paper, we propose an optimal design approach based on a concept of mosaic-like structure for achieving high performance NRD devices. order to improve efficiency, employ the recently proposed two-dimensional full vectorial finite element method (2D-FVFEM) which can accurately model 3D as numerical simulation method. As optimization method, either direct binary search (DBS) algorithm or genetic (GA) depending problems. show usefulness our approach, examples crossing and T-branch waveguides are considered transmission efficiency greater than 99.9% waveguide 49.8%: 49.8% is achieved. The results by 2D-FVFEM verified 3D-FVFEM.