Traditional photonic integrated devices are designed to predict their optical response by transforming the structure and parameters, and it is often difficult to obtain devices with excellent performance in all aspects. The nanophotonic computing design method based on the optimization algorithm has revolutionized the traditional photonic integrated device design technology. Here, we report a discrete differential evolution algorithm that simulates a natural selection process to achieve an ultracompact arbitrary power ratio splitter. The footprint of the designed splitter is only 2.5 mu m x 2.5 mu m, the simulated total transmission efficiency is above 90%, the power ratio error is less than 3%, and it can work normally over the C-band. Our algorithm can provide new ideas for the application of genetic algorithms to the automatic optimization of photonic integrated devices. (C) 2020 Optical Society of America
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机译：传统的光子集成装置旨在通过转换结构和参数来预测它们的光学响应，并且通常难以在各方面获得具有优异性能的装置。 基于优化算法的纳米光电计算方法彻底改变了传统的光子集成装置设计技术。 在这里，我们报告了一种离散的差分演进算法，该算法模拟了自然选择过程以实现超自然的任意功率比分离器。 设计分离器的占地面积仅为2.5 mu m x 2.5 mu m，模拟总传输效率高于90％，功率比误差小于3％，它可以正常工作在C波段上。 我们的算法可以为应用遗传算法应用到光子集成装置的自动优化提供新的思路。 （c）2020美国光学学会
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