Efficient generation of highly elliptically polarized attosecond pulses

被引：0
作者：
Liang Li
Zhe Wang
Fang Li
Hua Long
机构：
[1] Huazhong University of Science and Technology,School of Physics and Wuhan National Laboratory for Optoelectronics
[2] Wuhan Institute of Technology,Laboratory of Optical Information Technology
来源：
Optical and Quantum Electronics | 2017年 / 49卷
关键词：
High-order harmonic generation; Elliptically polarized;
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摘要：
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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