Detecting the full photoemission cone from laser-based ARPES experiments by leveraging deflector technology
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866909999708504064 |
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| author | Gauthier, Nicolas Frimpong, Benson Kwaku Armanno, Dario Jabed, Akib Goto, Francesco Hasse, Vicky Felser, Claudia Gu, Genda Ibrahim, Heide Légaré, Francois Boschini, Fabio |
| author_facet | Gauthier, Nicolas Frimpong, Benson Kwaku Armanno, Dario Jabed, Akib Goto, Francesco Hasse, Vicky Felser, Claudia Gu, Genda Ibrahim, Heide Légaré, Francois Boschini, Fabio |
| contents | Angle-resolved photoemission spectroscopy (ARPES) provides a direct access to the electronic band structure of solid and molecular systems. The momentum range accessible by this technique depends directly on the photon energy used, and low-photon-energy sources are insufficient to photoemit electrons over the full Brillouin zone of most quantum materials. In addition, while electrons are emitted over a 2$π$ solid angle, conventional hemispherical analyzers only collect a small subset of those electrons. A previous work [RSI 92, 123907 (2021)] demonstrated that electrons emitted over a larger field-of-view can be acquired in one fixed configuration by accelerating them towards the analyzer with a bias voltage. Here, we extend this work by leveraging the deflector technology of novel ARPES hemispherical analyzers. We demonstrate the ability to detect all $2π$ photoemitted electrons in a fixed configuration for various materials such as gold, cuprates and transition-metal dichalcogenides. This approach is especially advantageous for time-resolved ARPES, as electron dynamics over a large momentum range can be accessed with identical measurement conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_17099 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Detecting the full photoemission cone from laser-based ARPES experiments by leveraging deflector technology Gauthier, Nicolas Frimpong, Benson Kwaku Armanno, Dario Jabed, Akib Goto, Francesco Hasse, Vicky Felser, Claudia Gu, Genda Ibrahim, Heide Légaré, Francois Boschini, Fabio Materials Science Strongly Correlated Electrons Superconductivity Instrumentation and Detectors Angle-resolved photoemission spectroscopy (ARPES) provides a direct access to the electronic band structure of solid and molecular systems. The momentum range accessible by this technique depends directly on the photon energy used, and low-photon-energy sources are insufficient to photoemit electrons over the full Brillouin zone of most quantum materials. In addition, while electrons are emitted over a 2$π$ solid angle, conventional hemispherical analyzers only collect a small subset of those electrons. A previous work [RSI 92, 123907 (2021)] demonstrated that electrons emitted over a larger field-of-view can be acquired in one fixed configuration by accelerating them towards the analyzer with a bias voltage. Here, we extend this work by leveraging the deflector technology of novel ARPES hemispherical analyzers. We demonstrate the ability to detect all $2π$ photoemitted electrons in a fixed configuration for various materials such as gold, cuprates and transition-metal dichalcogenides. This approach is especially advantageous for time-resolved ARPES, as electron dynamics over a large momentum range can be accessed with identical measurement conditions. |
| title | Detecting the full photoemission cone from laser-based ARPES experiments by leveraging deflector technology |
| topic | Materials Science Strongly Correlated Electrons Superconductivity Instrumentation and Detectors |
| url | https://arxiv.org/abs/2601.17099 |