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lambda1
float64
0.51
1.23
lambda2
float64
0.79
1.48
blur_radius
int64
0
4
optimal_design
array 2D
optimization_history
listlengths
201
201
total_overlap
float64
-0.03
8.64
0.590095
1.295485
4
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0.120274
1.085751
0.894636
3
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2.686656
0.621044
0.956948
1
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1.189657
1.435928
0
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1.017285
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Photonics 2D (120x120) - Wavelength Demultiplexer (v1)

Inverse-design dataset for the EngiBench photonics2d problem: 2D photonic wavelength demultiplexers optimized with a finite-difference frequency-domain (FDFD) solver (ceviche). Each design routes light at two wavelengths to two separate output ports.

v1

v1 makes simulate and optimize mutually consistent: designs are stored as physical (projected) densities in [0, 1], and simulate evaluates them as-is, so the stored total_overlap is reproducible via Photonics2D.simulate(optimal_design). Boundary conditions match v0 one-for-one.

Columns

Column Description
lambda1, lambda2 input wavelengths (um)
blur_radius density blur-filter radius (px)
optimal_design 120x120 density in [0, 1]
optimization_history objective (total_overlap) per optimization step
total_overlap final objective (higher is better)

Splits: train / val / test = 1594 / 199 / 200.

Usage

from datasets import load_dataset
ds = load_dataset("IDEALLab/photonics_2d_120_120_v1")

Generated with EngiBench.

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