Laser-subcycle control of electronic excitation across system boundaries. (17th September 2021)

• Record Type: Journal Article
• Authors: Dorner-Kirchner, Martin; Erattupuzha, Sonia; Larimian, Seyedreza; Koch, Markus; Hanus, Václav; Kangaparambil, Sarayoo; Paulus, Gerhard; Baltuška, Andrius; Xie, Xinhua; Kitzler-Zeiler, Markus; Wang, YanLan; Lai, XuanYang; Yu, ShaoGang; Sun, RenPing; Liu, XiaoJun
• Is Part Of: Journal of physics. Volume 54:Number 16(2021)
• Publication Date: 2021-09-17
• Subjects: frustrated field ionization -- CEP-control of electron dynamics -- strong-field ionization of atomic dimers; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/ac21a1
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We report on the results of a joint experimental and numerical study on the sub-cycle laser field-driven electron dynamics that underlie the population of highly excited electronic states in multiply ionized argon dimers by electron recapture processes. Our experiments using few-cycle laser pulses with a known carrier-envelope phase (CEP) in combination with reaction microscopy reveal a distinct CEP-dependence of the electron emission and recapture process and, furthermore, a small but significant CEP-offset to the scenario in which no excited argon dimers are produced. With the help of classical ensemble trajectory simulations we trace down these different CEP-dependencies to subtle differences in the laser-driven sub-cycle electron trajectory dynamics that involve in both cases the transfer of an electron from one argon ion across the system boundary to the neighboring ion and its transient capture on this ion.