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Fig. 3 | PhotoniX

Fig. 3

From: Intelligent designs in nanophotonics: from optimization towards inverse creation

Fig. 3

GA for meta-atoms spectral modifications. (a) The working flowchart of GA. Here the spatial distribution of meta-atom in a unit cell is processed as a binary matrix (referred as an individual X) for the evaluation of a fitness function F(X). (b) GA-based prominent enhancement of broadband absorbances arising from gold nanoparticles. Left: the optimization process with the best value (red diamonds) and averaged value (green diamonds) of fitness scores \(\bar {A}\). After 25 generations the best value approaches 0.792, being equal to a spectral (from 350 to 800 nm) averaged absorption of 79.2%. Right: two best structure arrangements (upper) with their spectral behaviors (lower) at initial (red framed) and ultimate (black framed) generations, respectively. Figure reproduced with permission: (b) Ref. [29], Copyright 2020 ACS

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