Coherent multiphoton photoemission spectroscopy of image-potential state on Ir(111) surface
Abstract Multiphoton photoemission provides a means to investigate unoccupied electronic states via nonlinear light-matter interactions. In this work, we employ five-photon photoemission spectroscopy to identify, for the first time, the image-potential state (IPS) on the Ir(111) surface. Distinct from commonly studied noble metals such as Cu and Ag, the Ir(111) electronic structure leads to a strong sensitivity to excitation energy: a reduction from 1.57 eV to 1.49 eV significantly diminishes the signal. The theoretical analysis attributes this effect to the d -band proximity to the Fermi level, which influences the initial-state population and transition probabilities governing the multiphoton excitation pathways.
Authors
- Chun‐Liang Lin (ORCID: https://orcid.org/0000-0001-8781-3650)
- Ryuichi Arafune (ORCID: https://orcid.org/0000-0003-4371-6116)
- Chih‐Wei Luo (ORCID: https://orcid.org/0000-0002-6453-7435)
- H. Ishida (ORCID: https://orcid.org/0000-0003-2080-1561)
- N. Takagi (ORCID: https://orcid.org/0000-0002-0799-9772)
- Yu-Chan Tai (ORCID: https://orcid.org/0009-0000-3010-9283)
Institutions
- Nihon University (JP)
- National Yang Ming Chiao Tung University (TW)
- National Institute for Materials Science (JP)
- Kyoto University (JP)
- National Synchrotron Radiation Research Center (TW)
Publication Details
- Journal
- Applied Physics Express
- Published
- 2025-05-20
- DOI
- https://doi.org/10.35848/1882-0786/addb1e
- Citations
- 1
- Primary Topic
- Electron and X-Ray Spectroscopy Techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.66
Funders
- National Science and Technology Council
- Japan Society for the Promotion of Science