Isolated-attosecond-pulse generation by suppressing multiple rescatterings with plasmon-enhanced laser fields |
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| Authors: | Yi-Na Zheng Cai-Ping Zhang Hui-Fang Cui Xiao-Hu Xu Chang-Long Xia |
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| Affiliation: | College of Physics and Information Engineering, Shanxi Normal University, Linfen, People’s Republic of China |
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| Abstract: | An efficient scheme is proposed to generate broadband supercontinuum spectra and isolated attosecond laser pulses by suppressing multiple rescatterings with plasmon-enhanced laser fields. High-order harmonic generation from helium atoms in long wavelength is theoretically investigated. It is found that a quantum path interference and a multiple rescatterings interference are two fundamental limitations against the smooth degree of harmonic spectra. Numerical results show that the coherent superposition state in combination with plasmon-enhanced laser fields is robust for broadband supercontinuum generation. Then an isolated 78-as pulse can be directly generated. |
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| Keywords: | Isolated attosecond pulse multiple rescatterings plasmon-enhanced laser field superposition state |
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