A Study on Topology Optimization of Plasmonic Waveguide Devices Using Function Expansion Method and Evolutionary Approach
A Study on Topology Optimization of Plasmonic Waveguide Devices Using Function Expansion Method and Evolutionary Approach
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DOI：
10.1109/jlt.2018.2884903
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发表时间：
2019-02
影响因子：
4.7
通讯作者：
Akinori Koda;K. Morimoto;Yasuhide Tsuji
中科院分区：
文献类型：
--
作者：
Akinori Koda;K. Morimoto;Yasuhide Tsuji
提出了一种新的等离子体激元器件的拓扑优化方法。等离子体激元器件具有很大的潜力，可以将各种光学器件缩小到超过衍射极限，因此引起了人们的极大关注。为了发展高性能的等离子体器件，人们期望建立一种新的设计理论来代替传统的介质波导器件理论。在本文中，我们使用函数展开的方法来表示设计区域内的器件结构，并通过几种不需要灵敏度分析的进化方法来优化设计变量。通过光学二极管和光学环行器的设计实例，验证了该方法的有效性和实用性。
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.