Structural Color Filter (Surrogate Model Demo)
Application ID: 127291
This model of a simple electromagnetics application, a structural color filter, demonstrates using a surrogate model to solve both the forward and inverse problem.
The structural color filter consists of a metal-dielectric-metal interface that functions like a Fabry-Perot cavity with resonant peaks in its transmission spectrum. Depending on the thicknesses of each layer, different resonant frequencies and bandwidths can be attained - thus appearing as different colors in the visible spectrum. The model calculates color space coordinates LAB (and RGB, XYZ) based on input thicknesses d1, d2, and d3 and the surrogate model is trained to do the same.
Finally, an optimization study is used to solve the inverse problem, determining the appropriate thicknesses to achieve a desired color, using the pre-trained forward surrogate model.
The user can interact with this model using a custom app designed for smartphone layouts.
This model is based on the following academic paper: Dai et al., "Accurate inverse design of Fabry-Perot-cavity-based color filters far beyond sRGB via a bidirectional artificial neural network." Photonics Research 9, no. 5 (2021): B236-B246.
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