Ultrafast Simulation and Optimization of Nanophotonic Devices with Integral Equation Methods
Ultrafast Simulation and Optimization of Nanophotonic Devices with Integral Equation Methods
复制标题
用积分方程方法对纳米光子器件进行超快仿真和优化
DOI：
10.1021/acsphotonics.9b01137
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发表时间：
2019
期刊：
影响因子：
7
通讯作者：
Bruno, Oscar P.
中科院分区：
文献类型：
--
作者：
Sideris, Constantine;Garza, Emmanuel;Bruno, Oscar P.
由于其广泛的应用，集成光子学有望成为一个价值数十亿美元的产业。然而，由于缺乏解析解和数值模拟的困难，设计和建模光子器件仍然具有挑战性。最近，逆设计已经成为设计光子器件的一种很有前途的方法；然而，目前的实现需要大量的计算工作，因为它们使用低效的基于有限差分方法的电磁求解器。在这里，我们报告了一种新的、高效的基于边界积分方程的模拟器件的方法，它比现有的求解方法快几个数量级，更准确，几乎实现了谱收敛，并且没有数值色散。我们使用基于伴随方法的求解器开发了一个优化框架，在单核笔记本电脑上只需几分钟就可以设计出新的，准备制造的设备。作为演示，我们优化了三种不同的器件：非绝热波导锥度，1:2 1550 nm功率分配器和垂直入射光栅耦合器。
Integrated photonics is poised to become a billion-dollar industry due to its vast array of applications. However, designing and modeling photonic devices remains challenging due to the lack of analytical solutions and difficulties with numerical simulation. Recently, inverse design has emerged as a promising approach for designing photonic devices; however, the current implementations require major computational effort due to their use of inefficient electromagnetic solvers based on finite-difference methods. Here we report a new, highly efficient method for simulating devices based on boundary integral equations that is orders of magnitude faster and more accurate than existing solvers, almost achieves spectral convergence, and is free from numerical dispersion. We develop an optimization framework using our solver based on the adjoint method to design new, ready-to-fabricate devices in just minutes on a single-core laptop. As a demonstration, we optimize three different devices: a nonadiabatic waveguide taper, a 1:2 1550 nm power splitter, and a vertical-incidence grating coupler.
开放波导散射中的辐射条件、限制吸收原理和一般关系
影响因子：
1.3
作者：
A. Nosich
通讯作者：
A. Nosich
影响因子：
4.1
作者：
BERENGER, JP
通讯作者：
BERENGER, JP