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Selection of right-circular-polarized harmonics from p orbital of neon atom by two-color bicircular laser fields 被引量:1
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作者 chang-long xia Yue-Yue Lan +1 位作者 Qian-Qian Li xiang-Yang Miao 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第10期315-320,共6页
The polarization properties of high-order harmonic generation(HHG) in the two-color circularly polarized laser fields are investigated by numerically solving the two-dimensional time-dependent Schr?dinger equation. By... The polarization properties of high-order harmonic generation(HHG) in the two-color circularly polarized laser fields are investigated by numerically solving the two-dimensional time-dependent Schr?dinger equation. By adding a wavelength of 1600-nm right-circular-polarized field to an 800-nm left-circular-polarized field, HHG is simulated from a real model of neon atom with p orbital, but not from a hydrogen-like atom model with s orbital. The orders of 3n + 1 can be selected while the orders of 3n + 2 are suppressed by adjusting the intensities of the two pulses. The physical mechanism is analyzed by time-frequency analysis and semiclassical model. 展开更多
关键词 HIGH-ORDER harmonic generation CIRCULAR POLARIZATION field POLARIZATION SELECTION
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Generation of non-integer high-order harmonics and significant enhancement of harmonic intensity 被引量:1
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作者 chang-long xia Yue-Yue Lan xiang-Yang Miao 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第4期221-225,共5页
High-order harmonics from helium atom in the orthogonally two-color(OTC) laser field are investigated by solving the two-dimensional time-dependent Schrodinger equation.Non-integer high-order harmonics are obtained in... High-order harmonics from helium atom in the orthogonally two-color(OTC) laser field are investigated by solving the two-dimensional time-dependent Schrodinger equation.Non-integer high-order harmonics are obtained in some ratio of frequencies of two components.Pure odd and even harmonics from atoms could be separated in two components by adjusting the ratio of frequencies in OTC scheme,and the resolution of harmonics is improved at the same time.The physical mechanism is explained by the periodicity of dipole.With the same intensity of the incident laser,the intensity of the high-order harmonics from the OTC field scheme is improved by three orders of magnitude compared to the monochromatic laser field scheme.A theoretical scheme is provided for experimentally achieving improving energy resolution and separation of pure odd and even harmonics in atoms.Also,we provide a means for improving harmonic intensity. 展开更多
关键词 non-integer high-order harmonic generation the orthogonally two-color laser field the enhancement of harmonic intensity
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Effect of multiple rescattering processes on harmonic emission in spatially inhomogeneous field 被引量:1
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作者 Cat-Ping Zhang chang-long xia +1 位作者 xiang-Fu Jia xiang-Yang Miao 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第3期280-285,共6页
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 Schrtdinger equation and the classical ... 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 Schrtdinger 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 classica/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 harnaonic emission from molecular systems. 展开更多
关键词 high-order harmonic generation multiple rescatterings spatially inhomogeneous field
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