A quantitative comparison of time-of-flight momentum microscopes and hemispherical analyzers for time- and angle-resolved photoemission spectroscopy experiments
| Autor: | Rui Patrick Xian, Julian Maklar, Laurenz Rettig, Maciej Dendzik, Shuo Dong, Martin Wolf, Samuel Beaulieu, Yoav William Windsor, Tommaso Pincelli, Ralph Ernstorfer |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics - Instrumentation and Detectors Materials science Microscope Spectrometer Photoemission spectroscopy business.industry FOS: Physical sciences Angle-resolved photoemission spectroscopy Instrumentation and Detectors (physics.ins-det) 01 natural sciences 010305 fluids & plasmas law.invention Momentum Time of flight Optics law Extreme ultraviolet 0103 physical sciences Microscopy business Instrumentation |
| Zdroj: | Review of Scientific Instruments |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/5.0024493 |
| Popis: | 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 (XUV) 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. Comment: 19 pages, 9 figures. The following article has been submitted to Review of Scientific Instruments / AIP Publishing. After it is published, it will be found at https://aip.scitation.org/journal/rsi |
| Databáze: | OpenAIRE |
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