https://doi.org/10.1140/epjd/s10053-024-00813-x
Regular Article - Ultraintense and Ultrashort Laser Fields
Effect of different laser field intensities on the momentum distribution of photoelectrons in a spatially inhomogeneous field
1
School of Physics and Electronic Technology, Liaoning Normal University, 116029, Dalian, People’s Republic of China
2
School of Physics and Information Technology, Shaanxi Normal University, 710062, Xi’an, Shaanxi, People’s Republic of China
3
Institute of Atomic and Molecular Physics, Jilin University, 130012, Changchun, People’s Republic of China
b
weiweiyu2012@163.com
g
zhaoxi719@snnu.edu.cn
h
wangjun86@jlu.edu.cn
j
zhesongkeke@163.com
Received:
8
December
2023
Accepted:
29
January
2024
Published online:
20
February
2024
In the context of inhomogeneous laser fields, laser field intensity plays a pivotal and indispensable role in shaping the photoelectron momentum distributions (PMDs). This theoretical exploration delves into the intricate relationship between laser field intensity and PMDs. As laser field intensity increases, a discernible transformation unfolds within the PMDs, leading to the emergence of distinctive regions. Remarkably, this increase in laser field intensity obfuscates the once-prominent holographic interference phenomena, rendering them imperceptible. The theoretical framework reveals that electron tunneling, particularly in proximity to the peak of the laser pulse within the inhomogeneous field, stands as the primary driver behind the formation of high-energy structures. Similarly, our inquiry extends to scrutinizing the influence of the inhomogeneous coefficient on these high-energy structures. We further embark on a comprehensive analysis of the initial momentum inherent in the electron wave packet. It becomes evident that PMDs exhibit a keen sensitivity to the initial momentum, thereby revealing yet another layer of complexity in this multifaceted phenomenon. As an intriguing revelation, we unveil the potential for attaining high-energy structures at comparatively lower laser field intensities through strategic modulation of the inhomogeneity coefficient. This nuanced interplay between laser field intensity, inhomogeneity coefficient, and initial momentum provides a comprehensive understanding of the intricate dynamics underpinning the photoelectron momentum distribution in inhomogeneous laser fields.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
