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Published on: November 11, 2013
Charge-Density Ripples Modulated by Nuclear Quantum Effects in High-Harmonic Generation in Solids
Shi-Qi Hu1, Qing Chen1,2, Sheng Meng1,2,3
1Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics and , Beijing 100190, People's Republic of China.
None:
Nuclear quantum effects (NQEs) significantly influence many fundamental physical and chemical phenomena. However, their impact on ultrafast dynamics remains poorly understood. Here, we demonstrate that solid-state high-harmonic generation (HHG) provides a promising platform for probing NQEs in attosecond processes. In particular, NQEs substantially modify HHG trajectories due to charge density ripples (CDR) induced by nuclear quantum delocalization. Incorporating NQE-modulated CDR shifts the oscillation phase of HHG, and thus introduces special properties and measurable signatures in the harmonic features, including the emission symmetry and rotation angle of the harmonic polarization ellipse, providing a plausible explanation for recent experimental observations. These findings enable all-optical detection of NQE-driven charge fluctuations via HHG spectroscopy.
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