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Hyoseok Park

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Preprint Sep 2026

TorchFDTD: Differentiable FDTD on a single GPU

Gradient-based photonic design needs full-wave derivatives with respect to millions of parameters, but on a single GPU workstation the time-domain adjoint is limited by device memory and by the incompatibility of fused update kernels with automatic differentiation. Here, we present TorchFDTD, an open-source finite-diff...

Hyoseok Park · 0 citations
Open access Aug 2026

Metasurface color routers inverse-designed with a deep-learning-accelerated genetic algorithm for high-efficiency imaging

Full-wave electromagnetic simulations provide accurate field distributions for nanophotonic structures, but their high computational cost limits their direct use in large-scale inverse design. Here, we introduce a deep-learning-assisted inverse-design framework in which a neural network is trained with finite-differenc...

Hyoseok Park, Samuel Kim, Duk-Yong Choi et al. · 1 citation

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