Polarization and driving force analysis of coherent optical shear phonons in graphite
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866913830849740800 |
|---|---|
| author | Gerbig, Christian Morgenstern, Silvio Hassanien, Ahmed S. Adrian, Marlene Ungeheuer, Arne Baumert, Thomas Senftleben, Arne |
| author_facet | Gerbig, Christian Morgenstern, Silvio Hassanien, Ahmed S. Adrian, Marlene Ungeheuer, Arne Baumert, Thomas Senftleben, Arne |
| contents | Coherent optical phonons in the degenerate inter-layer shear mode of graphite launched by femtosecond laser pulses were investigated using ultrafast electron diffraction. The collective atomic motion is shown to be polarized in a direction related to the linear polarization of the incoming laser pulse. Using a fit with a generic driven-oscillator model, the lifetime of the oscillator's driving force is determined to 37(30) fs. This is much shorter than the lifetime of excited carriers in graphite but similar to the time scale of the loss of the hot carrier's k-space anisotropy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_16392 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Polarization and driving force analysis of coherent optical shear phonons in graphite Gerbig, Christian Morgenstern, Silvio Hassanien, Ahmed S. Adrian, Marlene Ungeheuer, Arne Baumert, Thomas Senftleben, Arne Materials Science Coherent optical phonons in the degenerate inter-layer shear mode of graphite launched by femtosecond laser pulses were investigated using ultrafast electron diffraction. The collective atomic motion is shown to be polarized in a direction related to the linear polarization of the incoming laser pulse. Using a fit with a generic driven-oscillator model, the lifetime of the oscillator's driving force is determined to 37(30) fs. This is much shorter than the lifetime of excited carriers in graphite but similar to the time scale of the loss of the hot carrier's k-space anisotropy. |
| title | Polarization and driving force analysis of coherent optical shear phonons in graphite |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.16392 |