Electron-Nuclear Energy Sharing in Above-Threshold Multiphoton Dissociative Ionization of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="bold">H</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Wu, Jian; Kunitski, Maksim; Pitzer, M.; Trinter, Florian; Schmidt, L. Ph. H.; Jahnke, T.; Magrakvelidze, Maia; Madsen, C. B.; Madsen, Lars Bojer; Thumm, Uwe; Dørner, R.

doi:10.1103/physrevlett.111.023002

Cited by 65 publications

(61 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Here, we focus on the joint energy spectrum (JES), which provides the differential probability of measuring a given electronic and nuclear kinetic energy. For interaction with strong near-infrared light, the JES is known to contain much more physical information than the standard PES and nuclear energy spectrum (NES) [22][23][24][25]. The aim of the present work is to demonstrate that dynamic interference occurs in H 2 + , and that the JES is crucial for the detection of the effect.…”

Section: Introductionmentioning

confidence: 93%

Dissociative ionization ofH2+using intense femtosecond XUV laser pulses

Yue

Madsen

2014

Phys. Rev. A

View full text Add to dashboard Cite

The dissociative ionization of H 2 + interacting with intense, femtosecond extreme-ultraviolet laser pulses is investigated theoretically. This is done by numerical propagation of the time-dependent Schrödinger equation for a collinear one-dimensional model of H 2 + , with electronic and nuclear motion treated exactly within the limitations of the model. The joint energy spectra (JESs) are extracted for the fragmented electron and nuclei by means of the time-dependent surface flux method. The dynamic interference effect, which was first observed in one-electron atomic systems, is in the present work observed for H 2 + , emerging as interference patterns in the JESs. The photoelectron and the nuclear energy spectra are obtained by integration of the JESs. Without the JESs, the photoelectron spectrum itself is shown to be inadequate for the observation of the dynamic interference effect. The resulting JESs are analyzed in terms of two models. In one model the wave function is expanded in terms of the "essential" states of the system, consisting of the ground state and the continuum states, allowing for the interpretation of the main features in the JESs in terms of dynamic interference. In the second model the photoelectron spectra from fixed-nuclei calculations are used to reproduce some features of the JESs using simple reflection arguments. The range of validity of these models is discussed and it is shown that the consideration of the population of excited vibrational states is crucial for understanding the structures of the JESs.

show abstract

Section: Introductionmentioning

confidence: 93%

Dissociative ionization ofH2+using intense femtosecond XUV laser pulses

Yue

Madsen

2014

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Since the dispersion introduced by the QWP, the neutral filter, and the viewport of chamber is not compensated, the UV pulse in the chamber is relatively long compared to the driving near-IR pulse, which is checked using a homebuilt transient-grating-based frequency-resolved optical gating [36]. By tracing the field-intensity-dependent shift of the sum energy of electron and proton from the , multiphoton dissociative single ionization of H2 [37], the peak intensities of the linearly and circularly polarized UV pulses in the interaction region are measured to be 3.6 x 1013 and 4.3 x 1013 W /cm 2, respectively. For the first ionization potential of C2H2 (Ipl ~ 11.4 eV), the Keldysh parameters [38] for the linear and circular UV pulses are calculated to be y ~ 3.3 and 4.3, respectively.…”

mentioning

confidence: 99%

Channel-Resolved Above-Threshold Double Ionization of Acetylene

Gong

Song

et al. 2015

Phys. Rev. Lett.

View full text Add to dashboard Cite

We experimentally investigate the channel-resolved above-threshold double ionization (ATDI) of acetylene in the multiphoton regime using an ultraviolet femtosecond laser pulse centered at 395 nm by measuring all the ejected electrons and ions in coincidence. As compared to the sequential process, diagonal lines in the electron-electron joint energy spectrum are observed for the nonsequential ATDI owing to the correlative sharing of the absorbed multiphoton energies. We demonstrate that the distinct channel-resolved sequential and nonsequential ATDI spectra can clearly reveal the photon-induced acetylene-vinylidene isomerization via proton migration on the cation or dication states.

show abstract

“…The measured ionization yield plotted as a function of both the electron-and ion-kinetic energies [hereafter called for short correlated kinetic energy (CKE) spectrum] thus exhibits the electronic and nuclear dynamics, as well as the connection between them [14,15,19,33]. While most theoretical works on molecules interacting with strong IR fields have reported either KER or EKE spectra, recently, few works (experimental and theoretical) have shown CKE spectra resulting from H 2 + and H 2 photoionization [16,19,34]. These CKE spectra show clearly how the energy is shared between the electron and the protons.…”

Section: Introductionmentioning

confidence: 99%

Molecular resolvent-operator method: Electronic and nuclear dynamics in strong-field ionization

et al. 2014

View full text Add to dashboard Cite

We present an extension of the resolvent-operator method (ROM), originally designed for atomic systems, to extract differential photoelectron spectra (in photoelectron-and nuclear-kinetic energy) for diatomic molecules interacting with strong, ultrashort laser fields in the single active electron approximation. The method is applied to the study of H 2 + photodissociation and photoionization by femtosecond laser pulses in the XUV-IR frequency range. In particular, the method is tested (i) in the perturbative regime, for few-photon absorption and bound-bound electronic transitions, and (ii) in the strong-field regime, in which multiphoton absorption and tunneling are present. In the latter case, we show how the differential ROM allows one to track the transition between both regimes. We also analyze isotopic effects by comparing the dynamics of H 2 + and D 2 + ionization for different pulses.

show abstract

Electron-Nuclear Energy Sharing in Above-Threshold Multiphoton Dissociative Ionization ofH2

Cited by 65 publications

References 35 publications

Dissociative ionization ofH2+using intense femtosecond XUV laser pulses

Dissociative ionization ofH2+using intense femtosecond XUV laser pulses

Channel-Resolved Above-Threshold Double Ionization of Acetylene

Molecular resolvent-operator method: Electronic and nuclear dynamics in strong-field ionization

Contact Info

Product

Resources

About