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Angle-resolved photoelectron spectroscopy in a low energy electron microscope
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Angle-resolved photoelectron spectroscopy in a low energy electron microscope
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Angle-resolved photoelectron spectroscopy in a low energy electron microscope
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Paper
Angle-resolved photoelectron spectroscopy in a low energy electron microscope
2023
Overview
Spectroscopic photoemission microscopy is a well-established method to investigate the electronic structure of surfaces. In modern photoemission microscopes the electron optics allows imaging of the image plane, momentum plane, or dispersive plane, depending on the lens setting. Furthermore, apertures allow filtering of energy-, real-, and momentum space. Here, we describe how a standard spectroscopic and low energy electron microscope can be equipped with an additional slit at the entrance of the already present hemispherical analyzer to enable an angle- and energy resolved photoemission mode with micrometer spatial selectivity. We apply a photogrammetric calibration to correct for image distortions of the projective system behind the analyzer and present spectra recorded on Au(111) as a benchmark. Our approach makes data acquisition in energy-momentum space more efficient, which is a necessity for laser-based pump-probe photoemission microscopy with femtosecond time resolution.
Publisher
Cornell University Library, arXiv.org
