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Flexible design of chiroptical response of planar chiral metamaterials using deep learning. | LitMetric

AI Article Synopsis

  • Optical chirality is essential for applications like biochemical sensing and imaging, but traditional design methods for chiral metamaterials are time-consuming and inefficient.
  • The authors introduce a bidirectional deep learning (BDL) network that includes two components: a spectra predicting network (SPN) and a design predicting network (DPN) to streamline the design and prediction process.
  • The BDL network significantly speeds up the design process to about 15 ms per prediction and maintains high accuracy, demonstrating its effectiveness in designing planar chiral metamaterials without overfitting or underfitting.

Article Abstract

Optical chirality is highly demanded for biochemical sensing, spectral detection, and advanced imaging, however, conventional design schemes for chiral metamaterials require highly computational cost due to the trial-and-error strategy, and it is crucial to accelerate the design process particularly in comparably simple planar chiral metamaterials. Herein, we construct a bidirectional deep learning (BDL) network consists of spectra predicting network (SPN) and design predicting network (DPN) to accelerate the prediction of spectra and inverse design of chiroptical response of planar chiral metamaterials. It is shown that the proposed BDL network can accelerate the design process and exhibit high prediction accuracy. The average process of prediction only takes ∼15 ms, which is 1 in 40000 compared to finite-difference time-domain (FDTD). The mean-square error (MSE) loss of forward and inverse prediction reaches 0.0085 after 100 epochs. Over 95.2% of training samples have MSE ≤ 0.0042 and MSE ≤ 0.0044 for SPN and DPN, respectively; indicating that the BDL network is robust in the inverse deign without underfitting or overfitting for both SPN and DPN. Our founding shows great potentials in accelerating the on-demand design of planar chiral metamaterials.

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Source
http://dx.doi.org/10.1364/OE.510656DOI Listing

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