Topology optimization for cloaking devices operating at multiple frequency

2016 Fiscal Year Final Research Report

• Project/Area Number: 26870239
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Design engineering/Machine functional elements/Tribology; Computational science
• Research Institution: Shinshu University
• Principal Investigator: FUJII Garuda 信州大学, 学術研究院工学系, 助教 (90569344)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: トポロジー最適化 / 光学クローク

Outline of Final Research Achievements

Topology-optimized carpet cloaks is presented using level-set boundary expressions. These carpet cloaks are designed with the idea of minimizing the value of an objective functional, which is here defined as the integrated intensity of the difference between the electric field reflected by a flat plane and that controlled by the carpet cloak. Cloaks, made of dielectric material, are designed to imitate reflections from a flat plane. The profiles associated with optimal configurations are controlled by adjusting a regularization parameter.
We also designed carpet cloaks operating at multiple frequency. The objective function is defined as the summation of the evaluation of the amount of scattering by a bump, and minimize the value of objective function. By computing the frequency response of the numerically evaluated scattering, we confirm the reduction of the scattering at multiple frequency.

Free Research Field

計算力学