Lubk, A. and Zweck, J. (2015) Differential phase contrast: An integral perspective. PHYSICAL REVIEW A, 91 (2): 023805. ISSN 2469-9926, 2469-9934
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Differential phase contrast (DPC) in a scanning transmission electron microscope is a widely employed technique for probing electromagnetic fields on the nanoscale. We show that the DPC signal corresponds to the averaged lateral probability current of the scattered electron probe. Based on this result we discuss the interpretation of DPC in terms of the projected electric and magnetic fields and the influence of experimental parameters thereon. We further show that DPC can be interpreted as a quantum weak measurement and that the reciprocal broad beam illumination technique is given by an astigmatic transport of intensity reconstruction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSMISSION ELECTRON-MICROSCOPY; PRIMARY WAVE FIELDS; OBJECT APPROXIMATION; ATOMIC-RESOLUTION; DETECTOR; STEM; INTERFERENCE; DIFFRACTION; RETRIEVAL; LIGHT; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Josef Zweck |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Jul 2019 12:06 |
| Last Modified: | 24 Jul 2019 12:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5975 |
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