Laser-pulse-shape control of photofragmentation in the weak-field limit

Ashwani Kumar Tiwari, Diptesh Dey, Niels Engholm Henriksen

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Abstract

We demonstrate theoretically that laser-induced coherent quantum interference control of asymptotic states of dissociating molecules is possible even in the (one-photon) weak-field limit starting from a single vibrational eigenstate. Thus, phase dependence in the interaction with a fixed energy phase-modulated pulse can persist for some time after the pulse is over. This is illustrated for the nonadiabatic process: I+Br*←IBr→I+Br, where the relative yield of excited Br* can be changed by pure phase modulation. It is shown that the phase is able to influence wave-packet spreading in the continuum as well as the average internuclear distance in each channel. © 2014 American Physical Society.
Original languageEnglish
JournalPhysical Review A
Volume89
Issue number2
Pages (from-to)023417
ISSN2469-9926
DOIs
Publication statusPublished - 2014

Cite this

Tiwari, Ashwani Kumar ; Dey, Diptesh ; Henriksen, Niels Engholm. / Laser-pulse-shape control of photofragmentation in the weak-field limit. In: Physical Review A. 2014 ; Vol. 89, No. 2. pp. 023417.
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abstract = "We demonstrate theoretically that laser-induced coherent quantum interference control of asymptotic states of dissociating molecules is possible even in the (one-photon) weak-field limit starting from a single vibrational eigenstate. Thus, phase dependence in the interaction with a fixed energy phase-modulated pulse can persist for some time after the pulse is over. This is illustrated for the nonadiabatic process: I+Br*←IBr→I+Br, where the relative yield of excited Br* can be changed by pure phase modulation. It is shown that the phase is able to influence wave-packet spreading in the continuum as well as the average internuclear distance in each channel. {\circledC} 2014 American Physical Society.",
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Laser-pulse-shape control of photofragmentation in the weak-field limit. / Tiwari, Ashwani Kumar; Dey, Diptesh; Henriksen, Niels Engholm.

In: Physical Review A, Vol. 89, No. 2, 2014, p. 023417.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Laser-pulse-shape control of photofragmentation in the weak-field limit

AU - Tiwari, Ashwani Kumar

AU - Dey, Diptesh

AU - Henriksen, Niels Engholm

PY - 2014

Y1 - 2014

N2 - We demonstrate theoretically that laser-induced coherent quantum interference control of asymptotic states of dissociating molecules is possible even in the (one-photon) weak-field limit starting from a single vibrational eigenstate. Thus, phase dependence in the interaction with a fixed energy phase-modulated pulse can persist for some time after the pulse is over. This is illustrated for the nonadiabatic process: I+Br*←IBr→I+Br, where the relative yield of excited Br* can be changed by pure phase modulation. It is shown that the phase is able to influence wave-packet spreading in the continuum as well as the average internuclear distance in each channel. © 2014 American Physical Society.

AB - We demonstrate theoretically that laser-induced coherent quantum interference control of asymptotic states of dissociating molecules is possible even in the (one-photon) weak-field limit starting from a single vibrational eigenstate. Thus, phase dependence in the interaction with a fixed energy phase-modulated pulse can persist for some time after the pulse is over. This is illustrated for the nonadiabatic process: I+Br*←IBr→I+Br, where the relative yield of excited Br* can be changed by pure phase modulation. It is shown that the phase is able to influence wave-packet spreading in the continuum as well as the average internuclear distance in each channel. © 2014 American Physical Society.

U2 - 10.1103/PhysRevA.89.023417

DO - 10.1103/PhysRevA.89.023417

M3 - Journal article

VL - 89

SP - 023417

JO - Physical Review A (Atomic, Molecular and Optical Physics)

JF - Physical Review A (Atomic, Molecular and Optical Physics)

SN - 2469-9926

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