Microscopy· 2026Q1
Extending the Computable Depth Range in Electron Ptychography using Event-Converted Data
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- Q1SCImago
- 2026year
Short summary
Electron ptychography can now achieve greater depth sectioning by converting 4D-STEM patterns into event lists, decoupling reciprocal-space sampling from detector pixel size.
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Key points
- Event-converted 4D-STEM data decouples reciprocal-space sampling from detector pixel size.
- This method reduces data volume and enables event-based loss function evaluation.
- Simulations and experiments on SSZ-13 zeolite validate the approach.
- Reconstruction quality and depth sectioning are retained with finer reciprocal-space sampling, extending computable depth range.
AI-generated from the title and abstract; the full text is not read.
Abstract
Iterative multislice electron ptychography enables depth sectioning but its range is constrained by the real-space patch imposed by detector sampling. Reconstruction using converted 4D-STEM patterns into electron-event lists decouples the model's reciprocal-space sampling interval from detector pixels size, reducing data volume, and enabling event-based loss function evaluation. The effect of patch size to the computable depth range, and the validity of the proposed method were demonstrated by simulation. The experimental demonstration on SSZ-13 zeolite shows improved reconstruction quality with preserved depth profiles; under 4× detector binning, reconstruction quality and depth sectioning are retained by selecting a finer reciprocal-space sampling interval, thereby extending the computable depth range without sacrificing angular coverage.
The authors' abstract, as published at the source. Microscopy, 2026 · DOI ↗
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