| Download | - View final version: Role of spin-orbit coupling in high-order harmonic generation revealed by supercycle Rydberg trajectories (PDF, 1.6 MiB)
- View supplementary information: Role of spin-orbit coupling in high-order harmonic generation revealed by supercycle Rydberg trajectories (PDF, 107 KiB)
|
|---|
| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevLett.129.173202 |
|---|
| Author | Search for: Mayer, N.ORCID identifier: https://orcid.org/0000-0002-8547-0073; Search for: Beaulieu, S.ORCID identifier: https://orcid.org/0000-0003-2316-2224; Search for: Jiménez-Galán, Á.1ORCID identifier: https://orcid.org/0000-0003-2116-7187; Search for: Patchkovskii, S.; Search for: Kornilov, O.; Search for: Descamps, D.ORCID identifier: https://orcid.org/0000-0003-0474-0551; Search for: Petit, S.; Search for: Smirnova, O.; Search for: Mairesse, Y.ORCID identifier: https://orcid.org/0000-0002-9098-7421; Search for: Ivanov, M. Y. |
|---|
| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
|
|---|
| Funder | Search for: H2020 Marie Skłodowska-Curie Actions; Search for: H2020 European Research Council; Search for: Agence Nationale de la Recherche; Search for: Deutsche Forschungsgemeinschaft |
|---|
| Format | Text, Article |
|---|
| Abstract | High-harmonic generation is typically thought of as a sub-laser-cycle process, with the electron’s excursion in the continuum lasting a fraction of the optical cycle. However, it was recently suggested that long-lived Rydberg states can play a particularly important role in high harmonic generation by atoms driven by the combination of the counterrotating circularly polarized fundamental light field and its second harmonic. Here we report direct experimental evidence of very long and stable Rydberg trajectories contributing to high-harmonic generation in such fields. We track their dynamics inside the laser pulse using the spin-orbit evolution in the ionic core, utilizing the spin-orbit Larmor clock. We confirm their effect on harmonic emission both via microscopic simulations and by showing how this radiation can lead to a well-collimated macroscopic far-field signal. Our observations contrast sharply with the general view that long-lived Rydberg orbits should generate negligible contribution to the macroscopic far-field high harmonic response of the medium. |
|---|
| Publication date | 2022-10-18 |
|---|
| Publisher | American Physical Society |
|---|
| In | |
|---|
| Other version | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 0203388c-41dc-44c3-a686-49a10b423808 |
|---|
| Record created | 2024-01-18 |
|---|
| Record modified | 2024-02-02 |
|---|
