Coherent multiphoton photoemission spectroscopy of image-potential state on Ir(111) surface
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 common...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | Applied Physics Express |
| Subjects: | |
| Online Access: | https://doi.org/10.35848/1882-0786/addb1e |
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| Summary: | 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. |
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| ISSN: | 1882-0786 |