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. 2019 Feb 4;9:1368. doi: 10.1038/s41598-018-37952-2

Figure 6.

Figure 6

Demonstration of DNN inverse design. We use ResNet DNN inverse design for 90% efficient power splitters. Here we show 8 representative devices with splitting ratios of 1:1, 1:1.05, 1:1.5, 1:1.55, 1:2, 1:2.5, 1:3, and 1:3.5 from a to h, respectively. Spectral response plots show that the numerically verified transmitted and reflected optical powers (dashed lines) of the predicted binary patterns match well with the target broadband spectra (solid lines). Electromagnetic energy density plots (right) of each device operating at 1,550 nm are calculated using FDTD simulations.