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Identifying the contributions of multiple-returning recollision orbits in strong-field above-threshold ionization.
- Source :
-
Optical & Quantum Electronics . Feb2018, Vol. 50 Issue 2, p0-0. 1p. - Publication Year :
- 2018
-
Abstract
- We calculate the photoelectron momentum distributions (PMDs) from strong-field above-threshold ionization of Ar in the co-linearly polarized two-color laser fields consisting a strong fundamental component and a much weaker second harmonic by solving the time-dependent Schrödinger equation. Utilizing the recently introduced phase-of-the-phase (PP) spectroscopy, we analyze the relative phase dependence of the PMDs of the recollision electrons and the jumps in the PP spectroscopy are observed. With the semi-classical model, we demonstrate that the phase jumps originate from the competition between the orbits where recollision occurs at different returnings. Thus, the relative contribution of the multiple-returning recollision orbits is unambiguously identified with the PP spectroscopy. Additionally, we show that the relative contribution of the multiple-returning recollision orbits depends on the laser wavelength and ellipticity. In elliptically polarized laser field, the yield of the high-energy photoelectrons favors the contribution of the second-returning recollision orbits. In 1600-nm laser field, the PP spectroscopy indicates that the relative contribution of multiple-returning recollision orbits is strongly sensitive to the electron energy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03068919
- Volume :
- 50
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Optical & Quantum Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 128311714
- Full Text :
- https://doi.org/10.1007/s11082-018-1332-4