Multiple collisions in crystal high-order harmonic generation
Dong Tang(唐栋)1,2 and Xue-Bin Bian(卞学滨)1,†
1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; 2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract We theoretically investigate high-order harmonic generation (HHG) in crystals induced by linearly polarized laser fields. We obtain the HHG spectra by solving the semiconductor Bloch equations and analyze the radiation process by different models. Here we propose a multiple collision model, in which the electrons and holes are produced at different times and places. It is found that the multiple collision trajectories can help us comprehensively and better explain the results of the quantum calculation. Moreover, we find that the harmonic suppression occurs due to the overlap of multiple collision trajectories.
(Ultrafast processes; optical pulse generation and pulse compression)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 91850121) and the K. C. Wong Education Foundation (Grant No. GJTD-2019-15).
Dong Tang(唐栋) and Xue-Bin Bian(卞学滨) Multiple collisions in crystal high-order harmonic generation 2022 Chin. Phys. B 31 123202
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