Abstract
The strong-field many-electron dynamics is studied via the resonance-enhanced high-order harmonic generation (HHG) of niobium. In intense IR lights excited states of Nb with the configuration 4d35snp play a vital role in the enhanced HHG below the ionization potential, even though the electron initially occupying the 5s orbital is the most active. The energies of these states increase linearly with the laser intensity, which causes the effective ionization potential to increase as well. Above the ionization potential, many-electron effects may cause an electronic state of Nb to be in resonance with that of Nb+, which leads to enhanced HHG and which influences the tunneling ionization as well.
| Original language | English |
|---|---|
| Article number | 053110 |
| Journal | Physical Review A |
| Volume | 105 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2022 |
Funding
This work is supported by National Science Foundation Grant No. PHY-1506441 and used the Extreme Science and Engineering Discovery Environment (XSEDE) expanse compute cluster at the San Diego Supercomputer Center at UC San Diego through Grant No. TG-PHY210099.
| Funders | Funder number |
|---|---|
| PHY-1506441 | |
| University of California at San Diego | TG-PHY210099 |
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