Efficient large field of view electron phase imaging using near-field electron ptychography with a diffuser.
Ultramicroscopy
; 231: 113257, 2021 Dec.
Article
en En
| MEDLINE
| ID: mdl-33773842
ABSTRACT
Most implementations of ptychography on the electron microscope operate in scanning transmission (STEM) mode, where a small focussed probe beam is rapidly scanned across the sample. In this paper we introduce a different approach based on near-field ptychography, where the focussed beam is replaced by a wide-field, structured illumination, realised through a purpose-designed etched Silicon Nitride window. We show that fields of view as large as 100 µm2 can be imaged using the new approach, and that quantitative electron phase images can be reconstructed from as few as nine near-field diffraction pattern measurements.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Ultramicroscopy
Año:
2021
Tipo del documento:
Article
País de afiliación:
Reino Unido