Pulsed laser deposition assisted epitaxial growth of cesium telluride photocathodes for high brightness electron sources
The development of high-brightness electron sources is critical to state-of-the-art electron accelerator applications like X-ray free electron laser (XFEL) and ultra-fast electron microscopy. Cesium telluride is chosen as the electron source material for multiple cutting-edge XFEL facilities worldwide. This manuscript presents the first demonstration of the growth of highly crystalized and epitaxial cesium telluride thin films on 4H-SiC and graphene/4H-SiC substrates with ultrasmooth film surfaces. The ordering of the film was characterized by in situ reflection high energy electron diffraction and multiple X-ray diagnostics. The results of the quantum efficiency performance for epitaxial cesium telluride photocathodes are also reported.
Authors
- Chad Pennington
- Thomas Juffmann (ORCID: https://orcid.org/0000-0002-7098-5736)
- R. M. Tromp
- Siddharth Karkare (ORCID: https://orcid.org/0000-0002-7759-0032)
- Sense Jan van der Molen
- K. Evans‐Lutterodt (ORCID: https://orcid.org/0000-0003-4743-4888)
- Elena Echeverría (ORCID: https://orcid.org/0000-0002-9472-6288)
- Mengjia Gaowei (ORCID: https://orcid.org/0000-0001-9535-5864)
- Kali Prasanna Mondal (ORCID: https://orcid.org/0000-0001-6250-9126)
- Jared Maxson (ORCID: https://orcid.org/0009-0004-6479-8848)
- Jean Jordan‐Sweet (ORCID: https://orcid.org/0000-0003-0291-3295)
- J. Smedley (ORCID: https://orcid.org/0000-0001-7149-9257)
- Pallavi Saha (ORCID: https://orcid.org/0000-0001-6708-7700)
- W. G. Stam (ORCID: https://orcid.org/0000-0001-9943-9707)
Institutions
- Leiden University (NL)
- University of Vienna (AT)
- Brookhaven National Laboratory (US)
- Cornell University (US)
- SLAC National Accelerator Laboratory (US)
- Max Perutz Labs (AT)
- Vienna Center for Quantum Science and Technology (AT)
- Arizona State University (US)
Publication Details
- Journal
- Scientific Reports
- Published
- 2025-01-27
- DOI
- https://doi.org/10.1038/s41598-025-87602-7
- Citations
- 4
- Primary Topic
- Electron and X-Ray Spectroscopy Techniques
- Type
- article
- Field-Weighted Citation Impact
- 2.64
Funders
- National Science Foundation
- U.S. Department of Energy
- European Commission
- Office of Science
- Brookhaven National Laboratory