1. Non-dipole effect in vortex high-order harmonic generation.
- Author
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Wang, Bincheng, Li, Liang, Zhang, Yinfu, Zhai, Chunyang, Zhu, Xiaosong, Lan, Pengfei, and Lu, Peixiang
- Subjects
VECTOR beams ,HARMONIC generation ,ANGULAR momentum (Mechanics) - Abstract
We discuss the non-dipole effect in high-order harmonic generation from atoms driving by a linearly polarized vortex beam. Different from the selection rule under the dipole approximation, where only odd high harmonics are allowed, both even and odd harmonics are generated in the vortex beam. Moreover, the polarization states of the harmonics are modulated. Elliptically polarized high harmonics can be directly generated with a linearly polarized vortex beam. We show that these non-dipole effects arise from the orbital angular momentum and spin angular momentum of the vortex beam. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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