Title: Coherence from multiorbital tunneling ionization of molecules

Journal Article · · Physical Review A
ORCiD logo [1]; ORCiD logo [2]
  1. Kansas State University, Manhattan, KS (United States); Kansas State University
  2. Kansas State University, Manhattan, KS (United States)
+ Show Author Affiliations

We present a simple and general coherence model for multiorbital tunnel ionization of molecules, which we incorporate into our previously developed density-matrix approach for sequential double ionization. Here, the influence of this coherence is investigated through simulations of single ionization and sequential double ionization of N2 and O2 using few-cycle near-infrared laser pulses. In the case of single ionization, our results reveal the crucial role played by this coherence in generating population inversion in N2+, suggesting a potential mechanism for air lasing. Regarding sequential double ionization, we observe only minor changes in the kinetic energy release spectra when the coherence is included, while noticeable differences in the angle-dependent dication yield for both N2 and O2 are found. Based on these findings, we recommend the inclusion of multiorbital tunnel ionization coherence in models for single ionization of general molecules, while suggesting that it can be safely neglected in the case of sequential double ionization.

Research Organization:
Kansas State University, Manhattan, KS (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
FG02-86ER13491
OSTI ID:
1996792
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 108; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (34)

Ultrafast charge migration by electron correlation journal July 1999
Structure factors for tunneling ionization rates of diatomic molecules journal May 2015
High harmonic interferometry of multi-electron dynamics in molecules journal July 2009
Real-time observation of valence electron motion journal August 2010
Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling journal September 2015
Attosecond molecular dynamics: fact or fiction? journal February 2014
Filming movies of attosecond charge migration in single molecules with high harmonic spectroscopy journal August 2022
Sub-cycle coherent control of ionic dynamics via transient ionization injection journal March 2020
Coulomb explosion of nitrogen and oxygen molecules through non-Coulombic states journal January 2011
High resolution kinetic energy release spectra and angular distributions from double ionization of nitrogen and oxygen by short laser pulses journal October 2004
Post ionization alignment of the fragmentation of molecules in an ultrashort intense laser field journal February 2005
Effect of orbital symmetry on the orientation dependence of strong field tunnelling ionization of nonlinear polyatomic molecules journal January 2011
Molecular electronic decoherence following attosecond photoionisation journal June 2020
Coherent electronic-vibrational dynamics in deuterium bromide probed via attosecond transient-absorption spectroscopy journal June 2020
Angle-dependent strong-field ionization and fragmentation of carbon dioxide measured using rotational wave packets journal October 2020
Attosecond XUV probing of vibronic quantum superpositions in Br 2 + journal November 2020
Vibronic coherence and quantum beats of O2+ based on laser pump-probe dissociation dynamics journal July 2021
Reconstruction of the vibronic-state density matrix based on pump-probe state-resolved energy spectra journal April 2022
Density-matrix approach for sequential dissociative double ionization of molecules journal August 2022
Modeling the sequential dissociative double ionization of O2 by ultrashort intense infrared laser pulses journal January 2023
Theory of molecular tunneling ionization journal September 2002
Multichannel coherence in strong-field ionization journal May 2009
Determination of structure parameters in strong-field tunneling ionization theory of molecules journal March 2010
Following dynamic nuclear wave packets in N 2 , O 2 , and CO with few-cycle infrared pulses journal October 2011
Theory of tunneling ionization of molecules: Weak-field asymptotics including dipole effects journal November 2011
Preparing attosecond coherences by strong-field ionization journal February 2016
Following coherent multichannel nuclear wave packets in pump-probe studies of O 2 with ultrashort laser pulses journal April 2018
Strong Field Ionization to Multiple Electronic States in Water journal August 2011
Multiorbital Tunneling Ionization of the CO Molecule journal April 2012
Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields journal April 2016
Electronic State Population Dynamics upon Ultrafast Strong Field Ionization and Fragmentation of Molecular Nitrogen journal September 2022
High Harmonic Generation from Multiple Orbitals in N2 journal November 2008
Laser Tunnel Ionization from Multiple Orbitals in HCl journal September 2009
Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses journal January 2013

Similar Records

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
Multiphoton or tunneling ionization & excitation
Quantum coherence & coherence measures
Strong field excitation
Strong-field-induced spectra