Affiliation:
1. University of Nizhny Novgorod
2. Russian Academy of Sciences
3. Voronezh State University
Abstract
We analyze the polarization response of a single Ne atom in an intense infrared (IR) laser field and weak extreme ultraviolet (XUV) isolated attosecond pulse (IAP). The analysis is based on the numerical solution of the time-dependent Kohn–Sham equations and the recently developed perturbation theory in the XUV field for an atom subjected to an intense IR field. In our numerical results, we observe a significant increase in the magnitude of the atomic polarization response at the frequencies near the carrier frequency of the IAP and associate it with XUV-induced collective dynamics contributing to the polarizability of Ne. The specific interference between IR- and XUV-induced channels is discussed, and its utilization for retrieving the phase of the generated harmonics in the IR field is suggested.
Funder
Russian Science Foundation
Ministry of Science and Higher Education of the Russian Federation
Foundation for the Advancement of Theoretical Physics and Mathematics
Subject
Atomic and Molecular Physics, and Optics
Cited by
5 articles.
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