Ionization and dissociation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>in intense laser fields at 1.064 μm, 532 nm, and 355 nm

Zavriyev, A.; Bucksbaum, Philip H.; Müller, H. G.; Schumacher, Douglass

doi:10.1103/physreva.42.5500

Cited by 335 publications

(166 citation statements)

References 22 publications

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“…In both cases, the strong gerade-ungerade (g ↔ u) coupling in the potential plays an important role [12]. This coupling also gives rise to the phenomena of bond softening and hardening [13,[31][32][33][34]. In our data, ionization from (1, 2) → (2, 2) and (2, 3) → (3, 3) falls under this category.…”

Section: Discussionmentioning

confidence: 78%

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A framework for understanding molecular ionization in strong laser fields

Menon

Nibarger

Gibson

2002

J. Phys. B: At. Mol. Opt. Phys.

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The aim of this paper is to examine the role of excited states and multi-electron interactions in molecular ionization by strong laser fields. We present new data on the ionization and dissociation of iodine molecules that reveal important aspects of the strong field-molecule interaction in the short pulse regime. Our data, along with previous studies, is inconsistent with the simplest and commonly accepted model of molecular ionization in a strong laser field and this has led us to examine closely the individual ionization steps. We have found that a molecule can ionize into several distinct configurations predominantly through multi-electron interactions and the abundance of such configurations is dependent on internuclear separation. The ionization appears to be dominated by pairs of states with gerade and ungerade symmetry, as they have a large dipole coupling and the transition is near resonant with the strong laser field. In a oneelectron molecule, this pair consists of the ground and first excited state whereas in a two-electron molecule this corresponds to the lowest lying pair of ionic states. In this paper, we propose a framework for organizing the numerous ionization pathways based on the electronic configuration of the initial charge state.

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Section: Discussionmentioning

confidence: 78%

“…The ionization therefore proceeds along vertical transitions with no change in the internuclear separation. Even though the (1, 0) dissociating channel is observed, it is small and can be attributed to bond softening [13,31,32]. Hence, (1, 1) is the first significant dissociation channel.…”

Section: Discussionmentioning

confidence: 99%

A framework for understanding molecular ionization in strong laser fields

Menon

Nibarger

Gibson

2002

J. Phys. B: At. Mol. Opt. Phys.

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“…[23,24]. In general, it refers to the mechanism by which a bound state is coupled to a dissociative state through the laser field.…”

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confidence: 99%

Angular Tunneling Ionization Probability of Fixed-in-SpaceH2Molecules in Intense Laser Pulses

et al. 2009

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Angular tunneling ionization probability of fixed-in-space H₂ molecules in intense laser pulsesWe propose a new approach to obtain molecular frame photoelectron angular distributions from molecules ionized by intense laser pulses. With our method we study the angular tunnel ionization probability of H 2 at a wavelength of 800 nm over an intensity range of 2-4:5 Â 10 14 W=cm 2 . We find an anisotropy that is stronger than predicted by any existing model. To explain the observed anisotropy and its strong intensity dependence we develop an analytical model in the framework of the strong-field approximation. It expresses molecular ionization as a product of atomic ionization rate and a Fourier transform of the highest occupied molecular orbital filtered by the strong-field ionization process.

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“…5 These potentially include high-order multiphoton ionization, enhanced ionization, 65,66 nonadiabatic multielectron ionization, 67 and Coulomb explosion, 68 multiphoton resonances leading to propagation on multiple potential energy surfaces, dynamic Stark effects, adiabatic passage by light-induced potentials, [69][70][71] and bond hardening/softening. 2, [72][73][74][75][76] In molecular systems in particular, the theory describing these individual effects is not always well-quantified, and therefore, the challenge of modeling (or understanding in detail) a situation where all of these processes may contribute to the system dynamics is often insurmountable.…”

Section: Controlmentioning

confidence: 99%

A Stark Future for Quantum Control

2010

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We present an overview of developments using the nonresonant dynamic Stark effect within the fields of time-resolved molecular dynamics and quantum control, drawing on examples from our own recent work. Particular emphasis is placed on the notion that "dynamics" and "control" are not distinct disciplines and that a clear synergy exits between these areas which has, up to now, been somewhat underexploited. The dynamic Stark effect is a universal interaction which we expect to have broad applicability.

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Ionization and dissociation ofH2in intense laser fields at 1.064 μm, 532 nm, and 355 nm

Cited by 335 publications

References 22 publications

A framework for understanding molecular ionization in strong laser fields

A framework for understanding molecular ionization in strong laser fields

Angular Tunneling Ionization Probability of Fixed-in-SpaceH2Molecules in Intense Laser Pulses

A Stark Future for Quantum Control

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