期刊
PHYSICAL REVIEW A
卷 83, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.053401
关键词
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资金
- ANR [ANR-08-JCJC-0029]
- Conseil Regional d'Aquitaine [20091304003]
- Agence Nationale de la Recherche (ANR) [ANR-08-JCJC-0029] Funding Source: Agence Nationale de la Recherche (ANR)
We study the Cooper minimum in high-order-harmonic generation from argon atoms by using long wavelength laser pulses. We find that the minimum in high-order-harmonic spectra is systematically shifted with respect to total photoionization cross section measurements. We use a semiclassical theoretical approach based on classical trajectory Monte Carlo and quantum electron scattering methods to model the experiment. Our study reveals that the shift between photoionization and high-order-harmonic emission is due to several effects: the directivity of the recombining electrons and emitted polarization, and the shape of the recolliding electron wave packet.
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