Magnetic Phase Imaging using Lorentz Near-field Electron Ptychography

TL;DR

This paper introduces a novel amplitude diffuser design for near-field electron ptychography, enabling improved magnetic phase imaging in TEM and Lorentz modes with larger fields of view and reduced inelastic scattering.

Contribution

The paper presents a new amplitude diffuser implementation that enhances near-field electron ptychography for magnetic phase imaging, adaptable within existing TEM setups.

Findings

Successful reconstruction in TEM and Lorentz modes

Reduced inelastic scattering with the amplitude diffuser

Enhanced field of view in magnetic phase imaging

Abstract

Over the past few years, the combination of diffuser and near-field electron ptychography has drawn more attention by its ability to recover large field of view with few diffraction patterns. In this paper, we purpose a novel design and implementation of amplitude diffuser. The amplitude diffuser introduces structures to the illumination while reducing the inelastic scattering. And the amplitude diffuser is implemented at the condenser lens aperture, allowing us to vary the illumination size under the same microscope setup. We demonstrate the reconstruction results under both conventional Transmission Electron Microscopy (TEM) mode as well as Lorentz mode.