Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1533476 | Optics Communications | 2016 | 8 Pages |
Abstract
The non-dipole (ND) effects on high-order harmonic generation (HHG) with the laser wavelength increasing towards the long wavelength region are investigated. Two major phenomena due to the ND effects, the decrease of the HHG intensity and the shift of the harmonic spectrum, are discussed. It is shown that, for the commonly used laser intensity Iâ¼1014Â W/cm2 and target with ionization potential Ipâ¼0.5a.u., the ND effects become nonnegligible when the laser wavelength is increased to the mid-infrared region of several thousand nanometers. It is also found that the variation of the ND effects presents different rules compared with those towards the high intensity region. Two fitting formulas are proposed to describe the variation rules. The physical meanings of the fitting results are discussed with classical calculation.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xiaosong Zhu, Zhe Wang,