Phase field method to optimize dielectric devices for electromagnetic wave propagation

JOURNAL OF COMPUTATIONAL PHYSICS

卷:257

Article

Takezawa, Akihiro¹  Kitamura, Mitsuru¹ 

[1] Hiroshima Univ, Div Mech Syst & Appl Mech, Inst Engn, Hiroshima, Japan

关键词: Phase field;    Shape optimization;    Electromagnetic system;    Sensitivity analysis;    Topology optimization;    Level set;   

DOI  :  10.1016/j.jcp.2013.09.051

来源: Elsevier

【 摘 要 】

We discuss a phase field method for shape optimization in the context of electromagnetic wave propagation. The proposed method has the same functional capabilities as the level set method for shape optimization. The first advantage of the method is the simplicity of computation, since extra operations such as re-initialization of functions are not required. The second is compatibility with the topology optimization method due to the similar domain representation and the sensitivity analysis. Structural shapes are represented by the phase field function defined in the design domain, and this function is optimized by solving a time-dependent reaction diffusion equation. The artificial double-well potential function used in the equation is derived from sensitivity analysis. We study four types of 2D or 2.5D (axisymmetric) optimization problems. Two are the classical problems of photonic crystal design based on the Bloch theory and photonic crystal wave guide design, and two are the recent topics of designing dielectric left-handed metamaterials and dielectric ring resonators. (C) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

Free