Bidirectional adversarial autoencoders for high precision metasurface design

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Abstract
Deep learning has been a critical part of designing inverse design methods that are computationally efficient and accurate. An example of this is the design of photonic metasurfaces by using their photoluminescent spectrum as the input data to predict their topology. One fundamental challenge of these systems is their ability to represent nonlinear relationships between sets of data that have different dimensionalities. Existing design methods often implement a conditional generative adversarial network in order to solve this problem, but in many cases, the solution is unable to generate structures that provide multiple peaks when validated. It is demonstrated that in response to the target spectrum, the bidirectional adversarial autoencoder is able to generate structures that provide multiple peaks on several occasions. As a result, the proposed model represents an important advance toward the generation of nonlinear photonic metasurfaces that can be used in advanced metasurface design.