Efficient generation of highly elliptically polarized attosecond pulses
Efficient generation of highly elliptically polarized attosecond pulses
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高效生成高度椭圆偏振阿秒脉冲
DOI:
10.1007/s11082-017-0912-z
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发表时间:
2017-01
影响因子:
3
通讯作者:
Long Hua
中科院分区:
文献类型:
--
作者:
Li Liang;Wang Zhe;Li Fang;Long Hua
We theoretically demonstrate a scheme to efficiently generate attosecond pulses with high ellipticity by a counter-rotating bicircular field with frequency ratio of 1 : 3 (800 + 267 nm) and 1 : 4 (1600 + 400 nm). It is shown that efficient attosecond pulses with high ellipticity of 0.54 (800 + 267 nm) and 0.79 (1600 + 400nm) can be generated. We also investigate the scaling law of high harmonic generation yield. It is shown that the intensity of the high harmonics can be increased by more than one order of magnitude in the bicircular fields with higher frequency ratios. The high ellipticity and high efficiency of high harmonics are explained by analyzing the symmetry of driving field and the classical electron trajectories.
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