Steering the Electron in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mn>2</mml:mn><mml:none /><mml:none /><mml:mo>+</mml:mo></mml:mmultiscripts></mml:math>by Nuclear Wave Packet Dynamics

Fischer, Bettina; Kremer, M.; Pfeifer, Thomas; Feuerstein, B.; Sharma, Vandana; Thumm, Uwe; Schröter, C. D.; Moshammer, R.; Ullrich, J.

doi:10.1103/physrevlett.105.223001

Cited by 108 publications

(100 citation statements)

References 21 publications

(27 reference statements)

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“…The observed modulations in the resulting kinetic energy release (KER) spectra of the Coulomb exploding nuclei were interpreted as a multiple pathway interference effect [3]. A similar electronic quantum interference process was proposed as a mechanism for electron localization in dissociating H + 2 [6]. Structures in the KER spectra, taking the form of a sequence of peaks, were also observed in other related experiments [7,8].…”

Section: The Hydrogen Molecular Ion (H +mentioning

confidence: 62%

Probing two-center interference in H2+using chirped pulses

Askeland

Førre

2013

Phys. Rev. A

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The influence of intermediate resonant dissociative channels in the few-photon ionization dynamics of H + 2 is demonstrated in a pump-probe scenario. Two-photon ionization of H + 2 by two sequentially applied pump and probe vuv/fs 10 11 W/cm 2 laser pulses is reported. The kinetic energy distribution of the ejected protons is calculated by solving the time-dependent Schrödinger equation within the Born-Oppenheimer approximation, including the electronic three-dimensional and vibrational one-dimensional motion. Population is effectively transferred from the 1sσg to the 3pσu potential surface, via resonant one-photon absorption, by applying a chirped pump pulse. The molecule is ultimately ionized by the probe pulse. It is found that a double-peaked structure appears in the resulting kinetic energy release spectra of the nuclear fragments. A corresponding modulated structure also appears in the dissociative channels, merely demonstrating that the double-peaked structure in the spectra originates from the molecular 1sσg-3pσu electronic dynamics, and an inherent twocenter interference in the underlying electric dipole coupling. It turns out that the dipole coupling between the 1sσg and 3pσu electronic states vanishes at an internuclear distance of 2.25 a.u., i.e., close to the equilibrium internuclear separation. The resulting node in the R-dependent dipole coupling imposes a minimum in the corresponding kinetic energy release spectra of the dissociating nuclei. By creating a negative or positive chirp in the applied pump pulse, it is found that the modulations can be made more or less salient.

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Section: The Hydrogen Molecular Ion (H +mentioning

confidence: 62%

Probing two-center interference in H2+using chirped pulses

Askeland

Førre

2013

Phys. Rev. A

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“…In this area, many interesting phenomena have been revealed, including the bond softening and hardening [5,6], the electron localization in dissociation channels [7,8], the above threshold Coulomb explosion (CE) [9,10], the high-order harmonic generation (HHG) [11,12], the abovethreshold ionization (ATI) and dissociation (ATD) [13,14] etc. Usually, the ionization probabilities (IPs) and/or the dissociation probabilities (DPs) are critical to gain high signals or high yields for these photochemical and photophysical processes.…”

Section: Introductionmentioning

confidence: 99%

Intensity enhancement in the molecular ionization and dissociation dynamics in the presence of noise

Feng

Chu

2012

J Mol Model

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The ionization and the dissociation of the diatomic molecular ion H 2 + have been investigated within a scheme where a noise field is added to an intense infrared laser field. The results show that both the ionization and the dissociation probabilities are enhanced with the introduction of the additional noise (the Gaussian white noise or the color noise) field. Further, by tuning the noise intensity and the delay time between the laser and the noise, a stochastic resonancelike curve is observed for the ionization or the dissociation dynamics, showing the existence of an optimal noise intensity and delay time for the given laser field.

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“…Han et al discussed steering dissociation of Br 2 molecules with two femtosecond pulses through wave packet interference [35]. More recently, localization and localizabililty of electrons is observed to strongly depend on the time delay between the two CEP-stable laser pulses by Fischer et al [36]. By analyzing the temporal signature of the asymmetry, they identified two different interference mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Nuclear interference in dissociating of HD+in ultrashort laser fields

Yang

Cong

2011

Phys. Rev. A

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The dissociation dynamics of HD + molecules is studied theoretically by numerically solving the timedependent Schrödinger equation in which the molecular vibrational and rotational degrees of freedom are included. Based on the Born-Oppenheimer approximation, the ground 1sσ g state and the excited 2pσ u state are taken into account, corresponding to two dissociative channels HD + →D + H + and HD + →H + D + , respectively. Two dissociative nuclear wave packets overlap and interfere after excited by two ultrashort laser pulses. The interference patterns can be controlled by varying the laser parameters and the dissociation probabilities are demonstrated for different laser fields. The kinetic energy-dependent distributions of the fragments are calculated using an asymptotic-flow expression in the momentum space. The branching ratio D, as a function of the delay time and the relative phase between two laser pulses, is also discussed.

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Steering the Electron inH2+by Nuclear Wave Packet Dynamics

Cited by 108 publications

References 21 publications

Probing two-center interference in H2+using chirped pulses

Probing two-center interference in H2+using chirped pulses

Intensity enhancement in the molecular ionization and dissociation dynamics in the presence of noise

Nuclear interference in dissociating of HD+in ultrashort laser fields

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