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Updated: Jun 9, 2025
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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
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Phonon-Coupled High-Harmonic Generation for Exploring Nonadiabatic Electron-Phonon Interactions.
Shi-Qi Hu1, Hui Zhao1, Xin-Bao Liu1
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, <a href="https://ror.org/05cvf7v30">Chinese Academy of Sciences</a>, Beijing 100190, People's Republic of China.
Physical Review Letters
|October 25, 2024
Summary
We uncovered how electron-phonon interactions influence high harmonic generation (HHG) by studying coherent phonons. This reveals new ways to probe electron-phonon coupling in materials.
Area of Science:
- Condensed matter physics
- Quantum optics
- Materials science
Background:
- High harmonic generation (HHG) is crucial for studying material properties and ultrafast dynamics.
- Understanding many-body interactions in HHG is limited by neglecting couplings with quasiparticles like phonons.
Purpose of the Study:
- To reveal the many-body electron-phonon mechanism in quasiparticle-coupled strong-field dynamics.
- To investigate nonadiabatic (NA) coherent-phonon-coupled HHG.
- To establish experimental methods for probing electron-phonon interactions.
Main Methods:
- Investigating nonadiabatic (NA) coherent-phonon-coupled high harmonic generation (HHG).
- Analyzing the influence of coherent phonons on HHG through adiabatic band modulation and nonadiabatic photocarrier distribution.
- Examining phonon period and phase delay in HHG intensity oscillations.
Main Results:
- Coherent phonons significantly impact HHG via adiabatic band modulation and nonadiabatic photocarrier dynamics.
- Both adiabatic and nonadiabatic mechanisms leave measurable fingerprints in HHG intensity oscillations.
- Phonon period and phase delay provide direct experimental signatures of electron-phonon interactions.
Conclusions:
- The study elucidates the crucial role of electron-phonon coupling in strong-field dynamics and HHG.
- Experimental measurement of phonon-induced effects on HHG oscillations allows direct probing of electron-phonon interactions.
- This work opens new avenues for exploring material properties and ultrafast dynamics through HHG.
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