A quantitative comparison of time-of-flight momentum microscopes and 
hemispherical analyzers for time- and angle-resolved photoemission spectroscopy 
experiments

Maklar, Julian; Dong, Shuo; Beaulieu, Samuel; Pincelli, Tommaso; Dendzik, Maciej Ramon; Windsor, Yaov William; Xian, R. Patrick; Wolf, Martin; Ernstorfer, Ralph; Rettig, Laurenz

doi:10.1063/5.0024493

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A quantitative comparison of time-of-flight momentum microscopes and hemispherical analyzers for time- and angle-resolved photoemission spectroscopy experiments

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/persons/resource/persons232536

Maklar, Julian
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons206871

Dong, Shuo
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons227651

Beaulieu, Samuel
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons227631

Pincelli, Tommaso
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons205838

Dendzik, Maciej Ramon
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Applied Physics, KTH Royal Institute of Technology;

/persons/resource/persons203272

Windsor, Yaov William
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons136124

Xian, R. Patrick
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Neurobiology, Northwestern University;

/persons/resource/persons22250

Wolf, Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21497

Ernstorfer, Ralph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons104701

Rettig, Laurenz
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Maklar, J., Dong, S., Beaulieu, S., Pincelli, T., Dendzik, M. R., Windsor, Y. W., et al. (2020). A quantitative comparison of time-of-flight momentum microscopes and hemispherical analyzers for time- and angle-resolved photoemission spectroscopy experiments. Review of Scientific Instruments, 91(12): 123112. doi:10.1063/5.0024493.

Cite as: https://hdl.handle.net/21.11116/0000-0007-D49F-7

Abstract

Time-of-flight-based momentum microscopy has a growing presence in photoemission studies, as it enables parallel energy- and momentum-resolved acquisition of the full photoelectron distribution. Here, we report table-top extreme ultraviolet time- and angle-resolved photoemission spectroscopy (trARPES) featuring both a hemispherical analyzer and a momentum microscope within the same setup. We present a systematic comparison of the two detection schemes and quantify experimentally relevant parameters, including pump- and probe-induced space-charge effects, detection efficiency, photoelectron count rates, and depth of focus. We highlight the advantages and limitations of both instruments based on exemplary trARPES measurements of bulk WSe₂. Our analysis demonstrates the complementary nature of the two spectrometers for time-resolved ARPES experiments. Their combination in a single experimental apparatus allows us to address a broad range of scientific questions with trARPES.