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Stochastic optimization of broadband reflecting photonic structures.
Scientific Reports ( IF 3.8 ) Pub Date : 2018-01-19 , DOI: 10.1038/s41598-018-19613-6
D. Estrada-Wiese , E. A. del Río-Chanona , J. A. del Río

Photonic crystals (PCs) are built to control the propagation of light within their structure. These can be used for an assortment of applications where custom designed devices are of interest. Among them, one-dimensional PCs can be produced to achieve the reflection of specific and broad wavelength ranges. However, their design and fabrication are challenging due to the diversity of periodic arrangement and layer configuration that each different PC needs. In this study, we present a framework to design high reflecting PCs for any desired wavelength range. Our method combines three stochastic optimization algorithms (Random Search, Particle Swarm Optimization and Simulated Annealing) along with a reduced space-search methodology to obtain a custom and optimized PC configuration. The optimization procedure is evaluated through theoretical reflectance spectra calculated by using the Equispaced Thickness Method, which improves the simulations due to the consideration of incoherent light transmission. We prove the viability of our procedure by fabricating different reflecting PCs made of porous silicon and obtain good agreement between experiment and theory using a merit function. With this methodology, diverse reflecting PCs can be designed for any applications and fabricated with different materials.

中文翻译:

宽带反射光子结构的随机优化。

建立光子晶体(PC)来控制光在其结构内的传播。这些可用于需要定制设计设备的各种应用。其中,可以生产一维PC,以实现特定波长范围和宽波长范围的反射。但是,由于每个不同PC所需的周期性排列和层配置的多样性,它们的设计和制造具有挑战性。在这项研究中,我们提出了一个框架,可为任何所需的波长范围设计高反射PC。我们的方法结合了三种随机优化算法(随机搜索,粒子群优化和模拟退火)以及减少空间搜索的方法,以获得定制和优化的PC配置。通过使用等距厚度法计算的理论反射光谱评估优化程序,由于考虑了非相干光传输,因此改进了仿真。我们通过制造由多孔硅制成的不同反射式PC证明了该程序的可行性,并使用性能函数在实验和理论之间取得了良好的一致性。通过这种方法,可以针对各种应用设计不同的反射PC,并用不同的材料制造PC。我们通过制造由多孔硅制成的不同反射式PC证明了该程序的可行性,并使用性能函数在实验和理论之间取得了良好的一致性。通过这种方法,可以针对各种应用设计不同的反射PC,并用不同的材料制造PC。我们通过制造由多孔硅制成的不同反射PC来证明我们的程序的可行性,并使用优点函数在实验和理论之间取得了良好的一致性。通过这种方法,可以针对各种应用设计不同的反射PC,并用不同的材料制造PC。
更新日期:2018-01-19
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