Physics-informed vector ptychography for imaging vector order parameters.

Authors

Charles Godfrey, Paolo G Radaelli

Published in

Optics express. Volume 34. Issue 20. Pages 37464-37477. Oct 05, 2026.

Abstract

Resonant soft X-ray ptychography is capable of imaging magnetic materials down to a few nanometres resolution, but conventional reconstructions treat the specimen as a scalar transmission function, discarding the vector information carried by resonant scattering. Optical vector ptychography recovers the Jones matrix, but requires polarisation analysis after the sample, which is impractical for soft X-rays. We introduce physics-informed vector ptychography (PIVP), which embeds the resonant scattering formalism in the ptychographic forward model, parameterising the Jones matrix by the local order parameter and removing the need for a downstream analyser. We demonstrate PIVP for the Néel vector of an antiferromagnet using simulated data for the proposed Diamond-II CSXID beamline, recovering the complete Néel field. We also demonstrate that, for this set of parameters, the fidelity of this approach is superior to conventional scalar reconstructions.

PMID:
42839441
Bibliographic data and abstract were imported from PubMed on 07 Oct 2026.

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