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- Title
The High-Order Harmonic Generation from Atom Driven by Co-Rotating Laser Pulses Composed of Fundamental Frequency and High Frequency.
- Authors
Chen, Yanzuo; Shen, Xuxu; Lan, Wendi; Li, Suyu; Guo, Fuming; Yang, Yujun
- Abstract
By numerically solving the time-dependent Schrödinger equation (TDSE), the harmonic generation process of atoms irradiated by corotating laser pulses composed of a fundamental-frequency and high-frequency field is systematically studied. Compared with the harmonic generated from atoms irradiated by counter-rotating two-color circularly polarized laser pulses, the harmonic efficiency of atoms irradiated by co-rotating two-color circularly polarized (CRTCCP) laser pulses with the same laser parameters is higher. The harmonics are generated by the multiphoton radiation transition after the bound electrons undergo a multiphoton absorption transition to a higher energy level. In addition, the variation of the harmonic efficiency with the field strength of different frequency components in the driving laser pulse is also studied. The circularly polarized harmonics with higher intensity can be obtained by optimizing the field strength of the driving laser field.
- Subjects
ATTOSECOND pulses; LASER pulses; HARMONIC generation; TIME-dependent Schrodinger equations; MULTIPHOTON absorption; ENERGY level transitions; ATOMS
- Publication
Symmetry (20738994), 2022, Vol 14, Issue 3, p519
- ISSN
2073-8994
- Publication type
Article
- DOI
10.3390/sym14030519