1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 2 University of Chinese Academy of Sciences, Beijing 100490, China; 3 Songshan Lake Materials Laboratory, Dongguan 523808, China; 4 School of Physics, Nankai University, Tianjin 300071, China
Abstract The high harmonic generation (HHG) by few-cycle laser pulses is essential for research in strong-field solid-state physics. Through comparison of high harmonic spectra of solids generated by laser pulses with varying durations, we discovered that lasers with good dispersion compensation are capable of producing a broad spectrum of high harmonics. As the pulse duration is further compressed, several interference peaks appear in the broad spectrum. Moreover, we conducted simulations using the semiconductor Bloch equation, considering the effect of Berry curvature, to better understand this process. Our work provides a valuable approach for studying HHG by few-cycle laser pulses in solid materials, expanding the application of HHG in attosecond physics.
Shuai Wang(王帅), Jiawei Guo(郭嘉为), Xinkui He(贺新奎), Yueying Liang(梁玥瑛), Baichuan Xie(谢百川), Shiyang Zhong(钟诗阳), Hao Teng(滕浩), and Zhiyi Wei(魏志义) High harmonic generation in crystal SiO2 by sub-10-fs laser pulses 2023 Chin. Phys. B 32 063301
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