Dynamics of enhanced and suppressed high-order harmonic generation of He atom by intense frequency-comb laser fields
POSTER
Abstract
<font _mstmutation="1">We present an ab initio nonperturbative investigation of enhanced and suppressed high-order harmonic generation (HHG) of He atom driven by the intense frequency-comb laser fields. The HHG is calculated by solving three-dimensional time-dependent Schrödinger equation by means of the time-dependent generalized pseudospectral method. The results show that each harmonic from the first harmonic all the way to the cutoff has a nested comb structure, and the frequency comb structures show immense enhancement and suppression by tuning the number of short laser pulses. The underlying physical mechanism of enhancing and suppressing HHG is illustrated by the interference effect of the HHG spectra originating from each short laser pulse.</font>
*This work was supported by the National Natural Science Foundation of China (Grands No. 11674268 and No. 12074239), Natural Science Foundation of Guangdong Province (Grant No. 2020A1515010927), Department of Education of Guangdong Province (Grant No. 2018KCXTD011 and 2019KTSCX037), and Shantou University (Grant No. 130-09400307). We also would like to acknowledge the partial support of the National Taiwan University (Grants No. 109L893201 and No. 109L104048).
Presenters
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Chang-Tong Liang
- Department of Physics, Shantou University