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001-es BibID:	BIBFORM113521
035-os BibID:	(cikkazonosító)053101 (Scopus)85159052059 (WoS)000985742400002
Első szerző:	Tóth Attila (fizikus)
Cím:	Role of dynamic Stark shifts in strong-field excitation and subsequent ionization / Attila Tóth, Sándor Borbély, Yueming Zhou, András Csehi
Dátum:	2023
ISSN:	1050-2947 2469-9934
Megjegyzések:	The energy levels of atoms and molecules exposed to intense, short, high-frequency laser pulses undergo time-dependent distortion known as dynamic Stark shift (DSS). These level shifts are induced by the coupling with nonresonant (nonessential) states and follow the temporal intensity profile of the laser pulse. Owing to the different DSSs of the individual atomic levels, transient resonance suppressions and enhancements significantly modify the multiphoton ionization pathway, leaving clear fingerprints (asymmetry, splitting, and shifting) in the energy spectrum of emitted photoelectrons. Here we investigate this phenomenon by solving the time-dependent Schrödinger equation of the valence electron of Na and Li in increasing levels of complexity: (i) developing minimal models for two-photon transition and (2+1)-photon ionization, (ii) applying a spectral method without continuum-continuum couplings, and (iii) propagating the electron wave packet on a large spatial grid accounting for all possible couplings. We show that appropriately detuned transform limited pulses provide a high level of control in strong-field excitation, when the atomic levels are dynamically shifted. Furthermore, we demonstrate the role of DSSs in the multipeak structure of the Autler-Townes doublet, found when several Rabi oscillations are induced during the strong-field resonant ionization.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Physical Review A. - 107 : 5 (2023), p. 1-14. -
További szerzők:	Borbély Sándor (fizikus) Zhou, Yueming Csehi András (1986-) (fizikus)
Pályázati támogatás:	GINOP-2.3.6-15-2015-00001 GINOP BO/00474/22/11 Egyéb
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