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The inverse design of structural color using machine learning

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Efficiently identifying optical structures with desired functionalities, referred to as inverse design, can dramatically accelerate the invention of new photonic devices, and this is especially useful in the design of large scale integrated photonic chips. Structural color with high-resolution, high-saturation, and low-loss holds great promise in image display, data storage and information security. However, the inverse design of structural color remains an open challenge, and this impedes practical application. Here, we propose an inverse design strategy for structural color using machine learning (ML) technologies. The supervised learning (SL) models are trained with the geometries and colors of dielectric arrays to capture accurate geometry-color relationships, and these are then applied to a reinforcement learning (RL) algorithm in order to find the optical structural geometries for the desired color. Our work succeeds in finding simple and accurate models to describe geometry-color relationships, which significantly improves the efficiency of the design. This strategy provides a systematic method to directly encode generic functionality into a set of structures and geometries, paving the way for the inverse design of functional photonic devices.

Graphical abstract: The inverse design of structural color using machine learning

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Publication details

The article was received on 19 Jul 2019, accepted on 25 Aug 2019 and first published on 27 Aug 2019

Article type: Paper
DOI: 10.1039/C9NR06127D
Nanoscale, 2019, Advance Article

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    The inverse design of structural color using machine learning

    Z. Huang, X. Liu and J. Zang, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR06127D

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