Angular resolved above-threshold ionization spectrum of an atom in IR+XUV orthogonally polarized two-color laser fields
作者： Facheng Jin , Huihui Yang , Bingbing Wang , Limin Wei , Huachun Wu
DOI: 10.1364/OE.27.020754
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摘要: We investigate the above-threshold ionization (ATI) process of atoms exposed to IR+XUV orthogonally polarized two-color laser fields by using frequency-domain theory. It is shown that there exists a dip structure in each plateau angular resolved ATI spectrum. The first attributed fact electron cannot absorb one XUV photon when its emission direction perpendicular polarization, while second coherent results different channels. emergence associated directly with field. Furthermore, applying saddle-point approximation, it found fringes on spectrum caused interference two trajectories for saddle-points IR Finally, that, high energy region, probability mainly determined field, and width field; other hand, low region only
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