Presentation Information
[C-15-27]Efficient Propagation Analysis of Rotationally Symmetric Optical Devices Using Periodic Boundary Conditions
〇Mio Taniguchi1, Yasuhide Tsuji2, Akito Iguchi2 (1. National Institute of Technology, Tomakomai College, 2. Muroran Institute of Technology)
Keywords:
rotationally symmetric structure,periodic boundary condition,optical waveguide device
With the advancement of information and communication technologies, there has been an increasing demand for high-performance optical devices, and the development of such devices using automatic optimization techniques has become increasingly active. In optimization-based design, efficient numerical analysis methods are essential for accurately evaluating device characteristics. For devices with structural symmetry, it is well known that the computational domain can be reduced by exploiting symmetry conditions, thereby significantly decreasing the computational cost [1]. However, for rotationally symmetric structures, it is common practice to analyze the entire device. By contrast, rotational symmetry allows the use of periodic boundary conditions, enabling a more efficient numerical analysis. In this study, we investigate the application of periodic boundary conditions to the finite element method (FEM) [2] used in automatic optimization in order to reduce the computational domain and improve computational efficiency. Specifically, periodic boundary conditions are imposed on the boundaries of the reduced computational domain to decrease the computational cost. The results demonstrate that efficient propagation analysis of rotationally symmetric optical devices can be achieved by exploiting periodic boundary conditions.