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Deep-learning-assisted designing chiral terahertz metamaterials with asymmetric transmission properties

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Abstract

Chiral metamaterial induced asymmetric transmission (AT) possesses great potential for terahertz (THz) polarization applications, but its design has mainly relied on the conventional trial-and-error forward strategy. Here, based upon massive training samples, we propose a deep-learning-based approach to accelerate the design of chiral metamaterials. The deep learning framework includes two bidirectional networks that allow the model to self-autonomously decipher the nonintuitive relationship between chiral metamaterial structures and their corresponding electromagnetic responses. Our preliminary results show that our model can accurately predict THz responses for any kind of metamaterial structure and inversely retrieve structure parameters from given THz responses. It turns out that the deep-learning-assisted methodology exhibits more efficient design performance than the conventional physical-based metamaterial design approach. This work might provide another artificially intelligent design strategy for chiral metamaterials and shed light on the prosperous development of unprecedented THz applications.

© 2022 Optica Publishing Group

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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