High-order harmonic generation in sub-one-cycle regime |
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Authors: | Xiang Yang Niu Yue-Ping Qi Yi-Hong Gong Shang-Qing |
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Affiliation: | a. School of Computer Science and Thechnology, Henan Polytechnic University, Jiaozuo 454000, China;b. Department of Physics, East China University of Science and Technology, Shanghai 200237, China |
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Abstract: | We theoretically investigate the high-order harmonic generation from the hydrogen atom driven by the laser pulses with the durations less than the optical cycle. It is found that the switching term of the laser field may have an obvious influence on the cutoff, intensity or plateau structure of the high-order harmonic spectrum. Generally speaking, the switching term can shorten the cutoff of the high-order harmonic spectrum for a relatively longer pulse and extend the cutoff for a relatively shorter pulse. |
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Keywords: | high-order harmonic generation sub-one-cycle pulse switching term |
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