Caplins, B.
, Holm, J.
and Keller, R.
(2018),
Transmission Imaging with a Programmable Detector in a Scanning Electron Microscope, Ultramicroscopy, [online], https://doi.org/10.1016/j.ultramic.2018.09.006
(Accessed December 12, 2024)
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Transmission Imaging with a Programmable Detector in a Scanning Electron Microscope
Published
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Abstract
A new type of angularly selective electron detector for use in a scanning electron microscope is presented. The detector leverages a digital micromirror device (DMD) to take advantage of the benefits of two-dimensional (2D) imaging detectors and high-bandwidth integrating detectors in a single optical system. The imaging detector provides direct access to the diffraction pattern, while the integrating detector can be synchronized to the microscope scan generator providing access to a real space image generated by integrating (pixel-by-pixel) a portion of the diffraction pattern as quantitatively defined by the DMD. The DMD, in effect, takes the place of the objective aperture in a transmission electron microscope (TEM) or an annular detector in a scanning transmission electron microscope (STEM), but has the distinct advantage that it can be programmed to take any shape in real time. Proof-of-principle data collected with the detector show diffraction contrast in samples ranging from a polycrystalline gold film to monolayer graphene.Citation
Ultramicroscopy
Volume
196
Pub Type
Journals
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Created September 13, 2018, Updated May 9, 2019