| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5448956 | Optics Communications | 2018 | 5 Pages |
Abstract
Isolated attosecond pulse (IAP) generation is theoretically investigated by using a few-cycle laser pulse from a two-dimensional model of hydrogen molecular ion. The harmonic spectra from two nuclei of hydrogen molecular ion lead to interference. We investigate the spatial distribution in harmonic generation and propose a scheme to restrain the harmonic generation from the nucleus along the positive-x direction, and thus the interference is weaken in spatial. By using a few-cycle 800 nm chirped laser pulse, the harmonics are mainly generated from the nucleus along negative-x direction in the region of 130th to 230th order. The harmonic spectra are smooth and are mainly contributed by the short quantum path near the cutoff region and IAP with a duration of 97 as is generated. The semiclassical of three-step model is also used to illustrate the physical mechanism.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Chang-Long Xia, Qi-Ying Liu, Xiang-Yang Miao,