A Study on Topology Optimization of Plasmonic Waveguide Devices Using Function Expansion Method and Evolutionary Approach

作     者：Koda, Akino Morimoto, Keita Tsuji, Yasuhide 

作者机构：Muroran Inst Technol Div Informat & Elect Engn Muroran Hokkaido 0508585 Japan 

出 版 物：《JOURNAL OF LIGHTWAVE TECHNOLOGY》 (J Lightwave Technol)

年 卷 期：2019年第37卷第3期

页      面：981-988页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0702[理学-物理学] 

基　　金：JSPS KAKENHI [18K04276] Grants-in-Aid for Scientific Research [18K04276] Funding Source: KAKEN 

主　　题：Evolutionary method finite element method (FEM) function-expansion method plasmonic waveguide device 

摘      要：We propose a novel topology optimization method for plasmonic devices. Plasmonic devices that have a great potential to downsize various optical devices beyond the diffraction limit attract a lot of attention. In order to develop high-performance plasmonic devices, a novel design theory is expected to be established instead of the conventional theory for dielectric waveguide devices. In this paper, we employ the function expansion method to express a device structure in the design region and optimize the design variables by using several evolutionary approaches, which do not require the sensitivity analysis. The validity and usefulness of this approach are demonstrated through the design examples of optical diode and optical circulator.