期刊
CHINESE PHYSICS B
卷 27, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/27/3/034206
关键词
high-order harmonic generation; multiple rescatterings; spatially inhomogeneous field
资金
- National Natural Science Foundation of China [11404204, 11274215, 11504221]
- Natural Science Foundation for Young Scientists of Shanxi Province, China [2015021023]
- Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi Province, China
- Innovation Project for Postgraduates of Shanxi Province, China [2017BY085]
The effect of multiple rescattering processes on the harmonic emission from He atom in a spatially inhomogeneous field is discussed by solving the one-dimensional time-dependent Schrodinger equation and the classical equation of motion. By establishing the physical model of the harmonic emission in the inhomogeneous field, we discuss the related characters of the multiple rescatterings process in the harmonic generation process. It shows that the second rescattering rather than the first rescattering tends to determine the harmonic cutoff energy when the inhomogeneous parameter is larger than 0.0055. Additionally, with the classical simulation, the underlying physical mechanism of the continuum-continuum harmonics is also revealed. Moreover, this work may provide new physical insight into the harmonic generation in an inhomogeneous field, and is beneficial to further extract the harmonic emission from molecular systems.
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